ST. LOUIS -- There were times this season that Reds closer Francisco Cordero turned what seemed to be a routine final three outs into an edge-of-your-seat nail-biter.

Cordero achieved the bottom line most of the time, as he notched 34 saves out of 40 chances. But there were some control issues. His 38 walks were his highest total since 2003 with the Rangers and 20 more free passes than allowed last year for the Brewers. He had 61 hits allowed over 70 2/3 innings.

Friday's development might have yielded some insight as to why. Cordero had been playing with a bone spur in his right foot all season, the Reds revealed. The right-hander underwent arthroscopic surgery and a minor microfracture procedure to have it removed. He will miss the season's final three games against the Cardinals.

"It's bothered him since Spring Training, actually," Reds manager Dusty Baker said. "He couldn't run or cover first base. He said some days it would feel fine. Other days, it would kill him. He never used it as an excuse. It's one reason his weight was up too. He couldn't run."

Team medical director Dr. Tim Kremchek performed the 90-minute procedure in Cincinnati. Cordero is expected to be fully recovered in time for Spring Training next year.

Signed to a four-year, $46 million contract with the Reds last winter as a free agent, Cordero was 5-4 with a 3.33 ERA in 72 games. He was available Thursday night in Houston, if he was needed.

"We were trying to keep him through the teams that were in the playoff hunt," Baker said.

That is not a worry this weekend, since St. Louis is out of contention.

Setup man and former closer David Weathers will handle the ninth inning in Cordero's place.

Reds starting pitcher Edinson Volquez also returned to Cincinnati to have his left knee examined and will undergo an MRI test on Saturday morning. Volquez, who was already scratched from his start on Sunday a couple of days ago, has been bothered by tendinitis.

Outfielder Chris Dickerson also had surgery on Friday to remove a small piece of bone from his left ankle. He is expected to be ready to go when camp opens in February.