On Wednesday afternoon, Boston Red Sox left-hander Rich Hill was forced from the mound after suffering an apparent elbow injury against the Chicago White Sox. From NESN's Tony Lee:

Just as I mention how terrific Rich Hill has been, we see him throw a pitch and immediately grab his left arm. He was in some serious pain, and immediately lifted.

Hill was only seven pitches into his seventh-inning relief appearance. A significant elbow injury would certainly be a major concern for a 31-year-old with a history of arm troubles.

Hill has pitched eight innings in 2011 without giving up a run. Originally a starter, the Red Sox moved him to the bullpen after a disastrous 2009 campaign. Hill is the only left-hander in the Boston bullpen, so if Hill's apparent injury is as serious as it appears, the Sox will have every reason to move quickly.

For more on Rich Hill and the Red Sox, check out SB Nation's Over The Monster.