The Mets have announced that they have placed starting pitcher Jeremy Hefner on the disabled list earlier today, according to multiple news reports.He has been diagnosed with a partial tear of the MCL in his right elbow.Hefner was optioned to Triple-A Las Vegas on Sunday to make room for Jon Niese’s return the team. It was reported on Sunday that Hefner would be examined for a potential elbow injury in New York."He's been a little 'ouchy' over the last 10 days, couple of weeks," general manager Sandy Alderson told Mets.com. "I'd rather not get too specific until the doctors have taken a look."Pre-All Star break Hefner had a 3.33 ERA and a 1.148 WHIP through 108 innings. Since the break he has pitched 22.2 innings over five starts yielding a 9.13 ERA and a 1.985 WHIP."I'm hurting the team right now," Hefner told Mets.com. "I don't need to try to be a hero."According to Adam Rubin his demotion to the minors has been rescinded. You can follow myself and TRDM on twitter @danny_ss and @realdirtymets.