MLB.com’s Anthony DiComo has the story:
Right-hander Shaun Marcum has temporarily stepped out of the Mets’ Grapefruit League rotation, but is not injured. [Manager Terry Collins] said Marcum wants to concentrate on a long-toss program designed to strengthen his shoulder, which gave him trouble last spring. He will return to game action in early to mid-March.
The Mets aren’t calling it a setback, but it definitely is. Marcum allowed four hits and three earned runs over two innings Saturday in his Grapefruit League debut against the Nationals and clearly isn’t anywhere close to full health.
Marcum dealt with both elbow and shoulder issues in 2012 and was limited to 124 innings.
He signed a one-year, $4 million free agent contract with the Mets this offseason.