The promise of Jenrry Mejia's quick start this season disintegrated Monday when the Mets announced that the 21-year-old prospect has a complete tear in the medial collateral ligament in his right elbow.

The team said "surgical treatment" has been recommended and that Mejia is expected to seek a second opinion. Either way, it's likely that he is headed for Tommy John surgery, which would cost him this season and most of 2012.

Mejia didn't allow a run in his first two starts for Triple-A Buffalo this season. His problems began April 19 when he struggled with command during a frigid day. On April 24, Mejia gave up five runs in six innings against Lehigh Valley, then left last Friday's start after only four innings because of elbow discomfort. Mejia, who was 1-2 with a 2.86 ERA in five starts, was examined Monday by Mets medical director David Altchek and an MRI revealed the tear.

Last year, Mejia made the Mets' Opening Day roster as a reliever but twice missed time with shoulder injuries. He suffered a strained rotator cuff in June, and after returning from that, suffered a rhomboid strain that ended his season Sept. 15.

Pagan playing again

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Angel Pagan played five innings in an extended spring training game, going 1-for-4 with a double and walk. Pagan is eligible to come off the disabled list Saturday.

Extra bases

Chris Young's seven-inning stint Sunday night marked the ninth start of his career in which he allowed no runs and two or fewer hits in at least seven innings. Since 2005, only Young and the White Sox's Jake Peavy have that many . . . Ronny Paulino became the first Met to collect five hits in his first start with the club.. . . Pedro Beato has not allowed an earned run in his first 17 innings for the Mets. It's the second-longest stretch in team history behind Jack DiLauro, who started with 172/3 innings in 1969.