Producer Thom Mount (who is part owner of the real Durham Bulls) hired Pete Bock, a former semi-pro baseball player, as a consultant on the film. Bock recruited more than a dozen minor-league players, ran a tryout camp to recruit an additional 40 to 50 players from lesser ranks, hired several minor-league umpires and conducted two-a-day workouts and practice games with Tim Robbins pitching and Kevin Costner catching. Bock made sure the actors looked and acted like ballplayers and that the real players acted convincingly in front of the cameras. He said, "the director would say, 'This is the shot we want. What we need is the left fielder throwing a one-hopper to the plate. Then we need a good collision at the plate.' I would select the players I know could do the job, and then we would go out and get it done".