PORT ST. LUCIE, Fla. - New York Mets reliever Pedro Feliciano will be restricted from baseball activity for at least two weeks while wearing a heart monitor.

General manager Sandy Alderson said Sunday it was not clear if Feliciano has a "hole" in his heart, which is what the left-hander said Saturday.

Alderson says that until Feliciano is monitored for two weeks, "we won't really have a diagnosis."

The 36-year-old Feliciano has not pitched since 2010, when he went 3-6 for the Mets with a 3.30 ERA and led the league with 92 appearances.

He signed a two-year, $8 million contract with the New York Yankees before the 2011 season, but never appeared in a game because of shoulder issues and surgery to repair a torn capsule and rotator cuff.