Texas Rangers reliever Mike Adams has been diagnosed with a neck strain and thoracic outlet syndrome, a pinched-nerve issue that has caused numbness in his right arm, reports Anthony Andro of Fox Sports Southwest:

Rangers reliever Mike Adams diagnosed with thoracic outlet syndrome.

— Anthony Andro (@aandro) September 30, 2012

Adams' issue is the result of a rib pinching a nerve that is designed to send signals to his arms. The worst-case scenario for the impending free agent Adams is off-season surgery to relieve pressure on the pinched nerve, but the Rangers believe that his symptoms are mild enough that he will be resume pitching without exacerbating the symptoms.

The 34-year-old will be treated for the syndrome over the next several days before the Rangers come to any decision about his place on the team's postseason roster. Adams has thrown fifty-four and a third innings out of the Texas bullpen this season, posting a 3.27 ERA and 7.7 K/9.