Andrew Keh, New York Times wrote: John Ricco, the Mets� assistant general manager, said the tear was discovered through a magnetic resonance imaging exam on Friday, the day after Niese was pulled from a game because of discomfort around his shoulder. Niese, a 26-year-old left-hander, was placed on the disabled list. He will rest for two weeks and then have another M.R.I. exam, at which point the team doctors are expected to make a recommendation on whether surgery is necessary. The Mets hope a procedure will not be necessary. Rotator cuff injuries � shoulder ailments as a whole, really � are considered ominous. The rotator cuff refers to the muscles that move the shoulder; the tendons that connect the muscles to the bone are susceptible to tearing. For some athletes, surgery can be avoided if the surrounding muscles are strengthened to the point that they can compensate for the weakened tendon. Pitchers who resort to rotator cuff surgery generally require several months to return to game form. Ricco said the team doctors believe Niese�s partial tear could be small enough that surgery will not be needed. Furthermore, the doctors indicated that the tear could start to heal on its own. Ricco was unwilling to offer a best-case return date. �He�s going to rest for two weeks, and I�m not going to speculate beyond that,� he said. �We have a plan for the next couple of weeks, and we�ll see how that goes.� Niese missed a start earlier this month after he was found to have shoulder tendinitis. An M.R.I. administered on May 30 revealed no structural damage. After skipping one rotation turn, Niese came back to pitch twice before Thursday�s outing, when he said he began to experience pain again. According to Ricco, the current tear occurred sometime after the initial first test. So it could start to heal on its own, and if it doesn't, they might be able to strengthen the surrounding muscles, so that he can pitch with the tear. I don't know how likely either of those things are to actually happen, but it seems that that's what we need to be rooting for.