Behind every pitch in professional ball is a guy like Dan O'Rourke, rubbing up baseballs in the Philadelphia Phillies clubhouse. He plucks a ball from a stack of boxes between his knees and prepares his hands with mud.
"I'm applying mud to the baseball to take the sheen, the shininess off the ball, so the pitchers have something to hold onto," he says. He gives the ball a few quick turns against his palm.
"I do roughly three to four balls at a time," he says.