Sources: Josh Koscheck has surgery

Welterweight Josh Koscheck underwent successful surgery Monday in Boston to repair a broken orbital bone on the right side of his face, sources close to the UFC-signed fighter told ESPN.com.

Depending on his recovery, Koscheck, 33, could head home to San Jose, Calif., as soon as Thursday. He may not be able to resume training at "100 percent" for four months, said Heidi Seibert, a representative for the fighter's management company, Zinkin Entertainment.

Koscheck (15-5) suffered the broken orbital during the first round of his UFC welterweight championship challenge against Georges St. Pierre (21-2) on Dec. 11 in Montreal.

Because of the severity of the injury, which was made worse when air pockets formed behind and under the break, Koscheck was unable to fly home. He was driven from Canada to Boston, where he was forced to postpone surgery for a week as swelling subsided.

Josh Gross covers mixed martial arts for ESPN.com.