Fernando Martinez is hurt—again.

The Mets’ No. 1 overall prospect was enjoying a stellar campaign in winter ball, dominating the Dominican League during the regular season and hitting a pinch-hit home run in the Caribbean Series.

But now Martinez, who turned 20 in October, is heading back to New York to have his right elbow checked out, according to MLB.com’s Jesse Sanchez.

"I felt my elbow tighten up the day before yesterday (after throwing)," Martinez said. "It was a little swollen. It’s better. I feel I can play again. I don’t think I need to fly to New York to get a check up but the Mets want me to."

Since signing for a seven-figure bonus out of the Dominican Republic in 2005 and making his debut in 2006, Martinez has racked up a medical file that includes (with regular season games played in parentheses):

• 2006: A bone bruise in his hand and a knee sprain (76)

• 2007: Broken hamate bone in his right hand (63)

• 2008: Recurring hamstring problems (90)

• 2009: Swollen right elbow

During the 2008 minor league season, Martinez batted .287/.340/.432 with Binghamton as the youngest player in Double-A. He hit .314/.376/.542 in 41 games this winter in the Dominican.