A former Montreal Expos groundskeeper claims that Pete Rose regularly used corked bats while playing for the club in 1984.

"Pete Rose would have his bats corked in the visitors' clubhouse at Olympic Stadium," Joe Jammer, the former groundskeeper,said. "I found out he was corking bats."

A corked bat is lighter, which allows players to swing the bat faster.

"Pete was too smart to deal with Expos equipment manager John Silverman (to cork his bats in the Expos' clubhouse). So Bryan Greenberg, who worked in the visitors' clubhouse, did it," Jammer told the Gazette. "He took me into a room, a door to the left, and underneath tarps there was this machine.

"...The guy (Greenberg) was saying Rose had been corking his bat for 20 years. The guy said that nobody checks him because he's a singles hitter."