By Gene Galin
Chapel Hill, NC — Hours before North Carolina and Southern California met Friday in an NCAA Baseball Super Regional at Boshamer Stadium, some of the most important work of the afternoon was taking place away from the batter’s box, beyond the dugout rail and far from the roar of the crowd. There, behind the scenes, UNC student managers sat with new baseballs, dark mud on their hands and a task that was part clubhouse chore, part baseball tradition and part quiet craftsmanship: rubbing down every ball before it could be put into play.
A hidden job before the spotlight
To most fans, a baseball appears ready the moment it comes out of the box. It is bright, white, tightly stitched and clean enough to look almost ceremonial. But in the language of baseball clubhouses, those new balls are often called “pearls” — too slick, too shiny and too bright to be trusted in a game where a pitcher may throw in the mid-90s and a hitter has only a fraction of a second to react.
That is where the mud comes in.
In our conversation recorded before Friday’s game at “the Bosh,” UNC student managers explained the pregame routine with a mix of humor and pride. Before every game, they said, they prepare roughly five dozen baseballs by applying a light, even coating of special rubbing mud. For NCAA regional and super regional play, the workload can increase substantially.
“Before every game, we get about five dozen baseballs, sit back here, put some mud on our hands, and rub them up for the game,” one manager said.
The process may sound simple, but the managers quickly made clear that it is not merely a matter of grabbing dirt and smearing it across leather. The goal is consistency. Too little mud leaves the ball slick. Too much mud can darken the ball, create uneven patches or affect how the ball looks coming out of a pitcher’s hand.
The preferred finish, one manager said, is “nice and smooth like a golden egg.”
The art of the mudded baseball
The work begins with a small amount of mud placed in the palm. Each ball is rotated by hand until the sheen is dulled and the surface takes on a more game-ready feel. The managers said different people develop different techniques, depending on how much mud they like to keep on their hands and how frequently they want to reapply it.
The standard, however, is the same: no lumps, no dark blotches, no uneven coating.
“You don’t want any lumps of darker mud on there,” one manager said. “Just like to make it nice and smooth.”
That matters because baseball is a game built on tiny visual and physical cues. A pitcher feels the ball through fingertips and seams. A hitter reads movement, rotation and release point. A catcher receives the ball at high speed and must be able to trust that it will not slip unexpectedly from a pitcher’s hand. A slightly different surface can be noticeable, especially to players who handle thousands of baseballs in practice and competition.
The managers also said a darker patch can make the spin of a pitch easier to see. That is one reason the best mudding is not heavy or obvious. It is meant to take the factory gloss off the ball without turning it into something visibly stained or irregular.
The goal is not to make a baseball look dirty. The goal is to make it playable.
Why new baseballs need help
A new baseball is not ideal for game use straight from the package. Its leather cover has a glossy finish, and that smoothness can make it difficult for pitchers to command the ball. In a sport where velocity, movement and location define outcomes, reliable grip is a safety issue as well as a performance issue.
In our conversation, longtime baseball photographer Brian Westerholt, who was watching the managers work, summarized the reason for the ritual plainly.
“To take the slickness off of the baseball,” he said. “So the pitchers can have a grip.”
Then he added the point that every player, coach and parent can understand: “If you’re throwing 95 to 98, you want to know where that ball is going.”
Brian’s point captures the practical heart of the tradition. The mud is not decorative. It is not superstition. It is part of the preparation that allows the game to be played at full speed.
A slick baseball can be hard to control. A ball that is too bright can be difficult for hitters to track. A ball with uneven preparation can create inconsistencies that players notice. The act of rubbing baseballs before a game is meant to reduce those problems before the first pitch is thrown.
A secret source with a long baseball history
The mud used in professional baseball is not ordinary infield dirt. The best-known baseball rubbing mud is Lena Blackburne Baseball Rubbing Mud, long associated with a secret location near the Delaware River in New Jersey. The exact source has been guarded for generations.
In our conversation, the managers described the mud as coming from the Delaware River area, noting that the person who harvests it does not let others follow him to the location. One manager joked that the work had been passed along within the family, possibly to a daughter.
The secrecy is part of the lore. The mud is often described in baseball circles as coming from a hidden spot in South Jersey, harvested periodically, cleaned, prepared and shipped to teams. Its reputation rests on a rare balance: fine enough not to damage the ball, gritty enough to dull the gloss, smooth enough to spread evenly and subtle enough not to discolor the baseball too much.
The mud’s story is commonly traced to Russell “Lena” Blackburne, a former major leaguer and coach with the Philadelphia Athletics. In the 1930s, Blackburne looked for a better way to prepare new baseballs after earlier methods — including ordinary dirt, tobacco juice and other substances — proved inconsistent or unpleasant. He found mud that worked better, and over time it became a standard part of baseball preparation.
The exact place where the mud is gathered remains one of baseball’s small mysteries. That mystery adds charm, but the mud’s value comes from performance. It works because it changes the ball just enough.
College baseball’s clubhouse labor
At Boshamer Stadium, the mudding work is handled by managers as part of their game-day responsibilities. The student managers said all of them learn the task, beginning in the fall during scrimmages. Every baseball used in those settings, they said, has been rubbed by their hands.
During regionals, the job grows. When North Carolina is the host team, the managers said, they are responsible for rubbing baseballs for every game in the regional. That means the work is not limited to games involving the Tar Heels. It is part of hosting a tournament.
For a normal game, one manager said the group may prepare five dozen baseballs. For the super regional weekend, they had far more ready: several dozen already in a bin, with more available for the current day and the next day. During the previous week’s regional, they said, the workload was heavy enough that baseballs were taken home and rubbed outside the ballpark.
One manager described spending about five hours by the pool rubbing baseballs.
That detail gives the job a humorous edge, but it also points to the unseen labor behind college baseball. Fans see the lineup, the pitching changes and the late-inning drama. They do not always see the people who prepare the balls, organize equipment, pack bags, chart pitches, handle laundry, set up practice and keep a dugout functioning.
Baseball, perhaps more than any other sport, depends on these small routines.
Five dozen at a time, and sometimes more
The number of baseballs used in a game can surprise casual fans. A ball may be removed after it hits the dirt, is fouled into the stands, becomes scuffed, is requested by a pitcher or is tossed to a fan. In postseason play, with higher stakes and heavier media attention, teams and officials must make sure there are always enough properly prepared balls available.
At UNC, the managers said the number can rise quickly during tournament weekends. One bin held about eight dozen baseballs, they said, with additional balls nearby for Friday and Saturday. During the regional round, multiple carts of baseballs were needed.
The preparation is repetitive, but it is not mindless. A manager must handle each ball individually. Each one must be worked by hand until it reaches the right look and feel. The process takes judgment, and that judgment is learned by doing it over and over.
One manager joked that another took “his sweet time,” while the second defended the slower method as art.
“This is art,” he said. “This is artwork right here.”
That playful disagreement is the kind of clubhouse banter that surrounds many baseball routines. But beneath the humor is a real point: people who rub baseballs develop preferences. They notice differences. They care about whether the job is done well.
The baseball changes, but only slightly
The best mudding is almost invisible. The ball should not appear caked, smeared or dramatically altered. Instead, it should lose its bright, factory-white shine and take on a slightly softened look. The surface should feel less slick without feeling rough or damaged.
That balance explains why ordinary dirt is not ideal. Dirt from a field can be too coarse. It can scratch the cover, stain the leather, gather in the seams or vary from ballpark to ballpark. The special mud used in baseball works because it is fine, smooth and consistent.
Scientific research in recent years has helped explain what baseball people have known by feel for decades. The mud appears to work through a combination of clay, water and fine grains that adhere to the leather, fill tiny pores and create a lightly abraded surface. The ball is not transformed into something new. Rather, it is made less slick and more manageable.
For pitchers, that can mean greater confidence. For hitters, the change helps reduce glare and excess brightness. For the sport, consistency matters because the same basic object — the baseball — is used to decide every pitch, every swing and every out.
A small ritual in a high-pressure setting
The setting for Friday’s mudding session added to the scene. North Carolina was hosting Southern California in a best-of-three NCAA Super Regional, with a trip to the Men’s College World Series at stake. Boshamer Stadium, already one of the ACC’s most active college baseball venues, was preparing for a postseason crowd.
The stadium’s public energy belonged to fans, players and coaches. But before that energy reached its peak, managers were quietly handling baseballs one at a time.
That contrast is part of what makes the ritual interesting. The work is done in the background, but the product of that work is present on every pitch. The first fastball, the first breaking ball, the first foul ball into the seats and the first souvenir tossed to a young fan all begin with a baseball that has passed through someone’s hands before it ever reaches the mound.
In our conversation, the managers recognized that there is little public glory in the task. Yet they also noted that occasionally a ball they prepared becomes a keepsake. Sometimes a baseball is tossed to a child in the stands. Sometimes a fan asks for a signature. Sometimes a manager gives a ball to a parent.
That moment gives the job a different kind of reward.
“When we give the balls to fans, it just makes it a little bit more worth it,” one manager said, describing the satisfaction of seeing a young fan receive a ball that he had helped prepare.
The keepsake side of a working baseball
Baseballs occupy a special place in sports culture because they can leave the field and become personal artifacts. A foul ball, home run ball or tossed warmup ball may become a child’s first souvenir, a parent’s display item or a reminder of a specific game.
For the managers, that gives the mudding process a human connection. A ball that begins as a task in a bin can end up in a bedroom, on a shelf or in a frame. One manager said he had given a ball to his mother. Another said he had given one to both parents. One mentioned a ball from California with a logo that made it meaningful enough to take home.
Our conversation was lighthearted, with me teasing about whether everyone had given a ball to their parents. But it revealed something important: even the people doing the least glamorous work can feel connected to the game’s memories.
The ball is the object fans most want to take home. It is also the object managers quietly prepare by the dozen.
Tradition survives because it works
Baseball is famously attached to tradition, but traditions usually last only when they continue to serve a purpose. Rubbing baseballs with special mud has lasted because the problem has never fully disappeared. New baseballs are still too slick and too glossy for ideal game use. Pitchers still need grip. Hitters still need to see the ball clearly. Umpires and officials still need balls that meet a consistent standard.
The mudding process has also survived changes in the sport. Baseball has adopted pitch clocks, expanded replay, improved analytics, changed postseason formats and built increasingly sophisticated player-development systems. Yet before the game begins, someone still sits down with a supply of baseballs and rubs each one by hand.
That blend of old and new is part of the game’s identity. Technology can measure spin rate, launch angle and exit velocity. But the baseball itself still begins with a tactile, human process.
In that sense, the work done at Boshamer Stadium on Friday was not merely a local curiosity. It was part of a chain connecting college baseball managers, major league clubhouses, umpires, scientists, equipment workers, fans and generations of players who have relied on the same basic idea: a baseball needs to be prepared before it can be trusted.
The difference between dirty and ready
The word “mud” can make the process sound messy. The reality is more precise. A properly mudded baseball is not dirty in the ordinary sense. It is prepared. It has been dulled, softened and made playable.
The student managers in Chapel Hill showed that the difference comes down to touch. They looked for a consistent base. They avoided thick patches. They worked the ball until it looked even. They checked each other’s work, joked about different methods and kept moving through the pile.
The finished ball still looks like a baseball. It just no longer looks like a “pearl.”
That distinction matters to the sport’s rhythm. When a pitcher toes the rubber, he does not want to think about whether the ball will slip. When an umpire puts a ball in play, he expects it to meet the standard. When the ball leaves the hand, every player on the field reacts on trust.
That trust begins before the crowd sees anything happen.
A game-day lesson for fans
For fans attending a high-level baseball game, the mudding process offers a reminder that the game is bigger than the scoreboard. Every pitch depends on preparation. Every game includes hidden labor. Every polished performance rests on tasks that are rarely shown on television.
At Boshamer Stadium, those tasks were being performed by student managers whose names may not appear in the box score. They were not likely to be interviewed after the game about a key hit or pitching change. But their work touched the game literally, one baseball at a time.
The scene also offered a more playful lesson: baseball’s most carefully guarded substance is not a high-tech polymer, a laboratory coating or an expensive synthetic compound. It is mud. Not just any mud, but mud with a story, a secret location and a role in keeping the sport playable.
That is why the ritual remains compelling. It is practical and strange at the same time. It belongs to the working side of baseball, but it carries the feel of folklore.
The game starts before the first pitch
By the time fans settled into Boshamer Stadium for Friday’s super regional game, the baseballs had already been through their first test. They had been handled, rubbed, checked and stacked for use. Their gloss had been removed. Their surfaces had been made more reliable. Their journey from factory-fresh pearls to game-ready baseballs was complete.
The players would decide the outcome on the field, but the managers had already shaped one essential condition of play.
That is the quiet beauty of baseball’s mudding ritual. It is not glamorous, but it matters. It is not complicated, but it requires care. It does not draw cheers, but it helps make every pitch possible.
Source notes: The Baseball Hall of Fame notes that MLB rules require baseballs to be “properly rubbed so that the gloss is removed” and traces Lena Blackburne Baseball Rubbing Mud to the 1930s.
The Delaware River Basin Commission says Lena Blackburne mud is used throughout Major League and Minor League Baseball and that colleges, high schools and Little Leagues also use it.
Axios reported in 2022 that MLB standardized its mudding process, including same-day application and a minimum rubbing time of 30 seconds.
Recent scientific work in The Sedimentary Record found the mud’s clays and quartz help fill pores, add color and gently abrade baseball leather without substantially changing aerodynamics.
Watch on YouTube – The CRAZY Way Baseballs Get Ready for Play!
The Art and Technique of Mudding Baseballs Before Game Day
00:04 Prep process for baseballs involves mudding before games.
- Before each game, staff muds approximately five dozen baseballs to ensure proper grip.
- The technique requires skill; improper mudding can lead to poor performance on the field.
00:56 Unique mud harvested in Delaware preps baseballs for play.
- The mud used for baseballs is sourced exclusively from a secret location in Delaware, known for its unique properties.
- This mud preparation process was traditionally managed by a single individual who has now passed the responsibility to his daughter.
01:46 Techniques for preparing baseballs with mud vary for optimal grip.
- Managers prefer different methods for applying mud to baseballs, opting for personal comfort and grip.
- A smooth application is crucial to avoid lumps, which can affect the pitcher’s ability to see the ball’s spin.
02:38 Different techniques are used to prepare baseballs with mud.
- There are competing techniques among staff to apply mud to baseballs, with some believing their own is superior.
- All equipment managers are involved in the mudding process, emphasizing it as an essential part of their job.
03:24 Baseballs are carefully prepared by hand for regional tournaments.
- Preparation starts in the fall with scrimmages, ensuring each baseball is properly rubbed.
- During super regionals, a larger quantity of baseballs is processed, sometimes exceeding five dozen.
04:17 Baseballs are prepared by rubbing them for better grip during play.
- Spending hours rubbing baseballs helps remove slickness, allowing pitchers to grip the balls effectively.
- The process of mudding baseballs is often met with curiosity from onlookers questioning the unusual activity.
05:10 Pitchers need a good grip on baseballs for accurate throwing.
- One manager emphasizes that slippery baseballs can lead to control issues, especially at high speeds.
- Manager highlights the joy of giving fans treated baseballs, adding a personal touch to the game.
05:56 Mudding baseballs connects players with fans and enhances their experience.
- Managers sometimes give signed baseballs to family and fans, creating cherished memories.
- Behind-the-scenes staff play a crucial role in preparing baseballs for gameplay.