Red Sox's Kimbrel has surgery to fix cartilage

BOSTON -- Craig Kimbrel had surgery Monday, as expected, to repair torn cartilage in his left knee.

Now, the clock begins ticking on the Boston Red Sox closer's return to the mound.

Kimbrel underwent a left knee arthroscopy and partial medial meniscectomy at Massachusetts General Hospital, according to a statement released by the Red Sox. The team continues to list Kimbrel's recovery at three to six weeks, although after a rehabilitation and a minor-league assignment, it's possible he won't resume pitching in big-league games until September.

Red Sox closer Craig Kimbrel may not be back on the mound for Boston until September."First off, after surgery we're going to have to get it stable, get…