Red Sox first baseman Sean Casey is officially retiring, according to a report by WEEI.com in Boston.

The report said Casey, nicknamed "The Mayor" for his friendly personality, has signed on with the MLB Network for role that has not been defined yet.

Casey, 34, hit .322 in 199 at-bats for the Red Sox last season. He also played in Detroit, Pittsburgh and Cleveland, but spent eight of his 12 big league seasons with the Reds.

A three-time All-Star, Casey had a .302 career average with 130 homers and 735 RBIs.

The MLB Network launched on Jan. 1 in approximately 50 million homes, the largest network debut in cable history. Casey would join former Major Leaguers Harold Reynolds, Al Leiter, Barry Larkin, Joe Magrane, Mitch Williams and Dan Plesac to offer insight on the Network.