In 2003, Sosa was ejected from a against the Tampa Bay Devil Rays in the first inning when umpires discovered he had been using a corked bat. Major League Baseball confiscated and tested 76 of Sosa's other bats after his ejection; all were found to be clean, with no cork. Five bats he had sent to the Hall of Fame in past years were also tested, and were all clean as well. Sosa stated that he had accidentally used the corked bat, which he claimed he only used during batting practice and home run contests. Sosa was suspended for eight games. However, the suspension was reduced to seven games after appeal.
There is also a recent story out that someone in the commissioner's office called the Cubs and warned them an inspector was on the way, and that they should discard all corked bats. In the same story they said over 100 corked bats were discarded by various Cub players including Sammy Sosa.