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Shaun Marcum done for season with thoracic outlet syndrome, according to reports

Shaun Marcum of the Mets walks to the

Shaun Marcum of the Mets walks to the dugout after the first inning against the Arizona Diamondbacks at Citi Field. (July 1, 2013) Credit: Jim McIsaac

Shaun Marcum has been diagnosed with thoracic outlet syndrome and will undergo season-ending surgery Monday, according to multiple reports.

The Mayo Clinic describes TOS as such: "Thoracic outlet syndrome is a group of disorders that occur when the blood vessels or nerves in the thoracic outlet — the space between your collarbone and your first rib — become compressed."

The Mets activated 25-year-old pitcher Gonzalez Germen from Triple-A Las Vegas to fill his roster spot.

Marcum recorded only one win (1-10 record) and posted a 5.29 ERA with 60 strikeouts in his first season with the Mets. The 31-year-old missed about the first month of the season with right shoulder and neck issues.

TOS is the same injury that has plagued Jeremy Bonderman and Chris Carpenter. Bonderman went 1-3 with a 4.93 ERA in seven starts with the Seattle Mariners this season in his attempted comeback from the injury before recently being designated for assignment after back-to-back poor starts. Carpenter, the 2005 National League Cy Young winner, has yet to pitch this season for the St. Louis Cardinals and remains on the 60-day disabled list, but has begun throwing sessions.

New York Sports