Columbus Crew defender Mike Lapper suffered a knee injury in a exhibition game against Kansas City in Bradenton, Fla., on Wednesday. The club fears it could endanger his availability for the entire 2002 season. Lapper, 31, hurt his on a slide tackle. It was diagnosed initially as torn anterior cruciate and medial collateral ligaments by team doctor Scott Van Steyn. He will under an MRI in within days. Lapper tore the ACL in his left knee on May 9, 1998 and missed the remainder of that season. Lapper has appeared in 106 games for Columbus, since joining The Crew prior to the 1997 season.