SNY and Marty Noble of MLB.com are reporting that Pedro Martinez will be out four to six weeks due to a "mild strain of the left hamstring."
Nelson Figueroa has been called up and is already with the team.
Figueroa is a former Met farmhand who looked impressive in Spring Training.
Since the Mets do not need a fifth starter until April 12, Figueroa will help out in the bullpen for now.
Many speculate that Jorge Sosa will replace Martinez in the rotation, however Sosa seems to be an important cog in the bullpen machine, which is currently without Duaner Sanchez and relying on young Joe Smith who had a shaky spring and newcomer Matt Wise who has already logged two shaky outings against the Florida Marlins.
Figueroa has experience as a starter and had an outside shot to win the fifth starter's role in Spring Training.
It looks like Figueroa will have the chance to claim that spot if Willie Randolph is indeed reluctant to move Sosa from the bullpen.
Martinez could resume pitching activities in about four weeks. He may need to make a couple of minor league starts before potentially joining the Mets in mid to late May.