Kansas City, Mo. ? Marc Boerigter will undergo knee surgery today and might be lost for the year, throwing the Kansas City Chiefs’ tattered wide-receiver corps into disarray.

Boerigter, who seemed ready to rebound from a subpar 2003 season, twisted his right knee in a noncontact play early in the Chiefs’ 21-19 exhibition loss Saturday night to Cleveland.

Coach Dick Vermeil said Sunday that doctors believed Boerigter might have suffered ligament damage.

“I’ll know more tomorrow after they operate as to what the projections are,” Vermeil said. “Personally, I don’t believe (Boerigter will return) this season. That hurt me more than losing the game.”

Johnny Morton, slated to start alongside Eddie Kennison at wide receiver, has missed virtually the entire training camp with a sore Achilles’ tendon. Kennison, also slowed by injury, made his first start of the preseason against the Browns.