 In a 1987 game against the Milwaukee Brewers, Mohorcic was accused of doctoring the baseball.Umpires found no evidence of wrongdoing at the time, but after the game Mohorcic complained of a sore throat, and was admitted to a hospital where it was discovered that he was suffering internal bleeding as a result of having Crohn's disease and taking the pain reliever naproxen.It was erroneously reported by Peter Gammons that Mohorcic's bleeding was caused by swallowing sandpaper.