http://sports.espn.go.com/mlb/news/story?id=3508931

MIAMI -- Mets pitcher John Maine left the game Monday night at Florida after 4 1/3 innings because of stiffness in his right shoulder, and he'll return to New York for tests

The right-hander, who departed after throwing 75 pitches, said he had felt pain in the back of his shoulder since his last start.

He took a 2-0 lead into the fifth inning, but when he fell behind leadoff batter John Baker 2-0, the trainer and manager Jerry Manuel went to the mound.

Maine stayed in the game, and Baker homered on the next pitch. After Maine retired the next batter, Manuel removed him.

"I'm frustrated because I want to go out there and pitch, but I understand where they're coming from," Maine said. "It was the right decision."

Maine allowed four hits, struck out six and walked one. It's uncertain whether he'll miss any starts for the NL East leaders.

"I told him if there's any pain, you will miss a start," Manuel said.