Shaun Marcum's Mets career came to a close in July of this year, when he had surgery for thoracic outlet syndrome (TOS). Marcum's recovery is progressing well, agent Rex Gary tells MLBTR, and he'll be on his normal offseason throwing program in the coming months. The righty, 32 in December, is expected to be ready for spring training.

TOS is a condition caused when the blood vessels or nerves between the collarbone and first rib become compressed. In Marcum's case, numbness and coldness in his pitching hand was affecting his ability to grip the baseball, Mets assistant GM John Ricco told Adam Rubin of

Limited to 124 innings in 2012 due to an elbow injury, Marcum signed a one-year deal with the Mets for $4MM guaranteed in January of this year. He tossed 78 1/3 innings for the Mets in 2013, posting a 5.29 ERA.