CHICAGO (AP) _ Cubs' closer Rod Beck said he needs surgery for a bone spur on his pitching arm, an old injury that has flared up and landed him on the 15-day disabled list.

Manager Jim Riggleman said he isn't sure the elbow spur has anything to do with the veteran right-hander's recent woes. Beck has blown four saves this year and has a 10.54 ERA.

The Cubs sidelined Beck after their 8-1 victory over Florida on Monday night.

Beck said the only question is when the surgery should be done. He said if it was done now, he would miss up to eight weeks.

``It's inevitable at some point, now or at the end of the year, that we're going to have to clean it out,'' Beck said.

He said he tried to pitch his way through the injury.

``Maybe I should have said something about it years ago,'' he said.

The Cubs have tried unsuccessfully to acquire Rick Aguilera from the Minnesota Twins as a backup to Beck. They are now expected to use either Terry Adams or Terry Mulholland as the team's primary closer in Beck's absence.