NEW YORK — New York Mets closer Billy Wagner has tightness around his left shoulder, which an MRI exam today showed was a muscle spasm around his pitching arm.

The left-hander felt tightness while warming up Sunday, but struck out three consecutive Cincinnati Reds in the 10th inning to earn his 24th save in New York's 7-5 win.

Team spokesman Jay Horwitz said Wagner was examined at the Hospital for Special Surgery in New York.

Wagner has a 2.20 ERA and 48 strikeouts in 41 innings and has blown six saves. While pitching for the National League in last week's All-Star game, Wagner also gave up the tying run to the AL in the eighth inning.

He has 382 career saves, sixth on baseball's career list and third among active pitchers behind Trevor Hoffman (541) and Mariano Rivera (467).