Percival back on the shelf

During today's game Tampa Bay Rays pitcher Troy Percival fell on the mound while throwing a pitch. He officially left the game because of tightness in his hamstring, thou the official type of injury hasn't been announced yet. The pitcher will undergo an MRI and then be re-evaluated by team doctors on Thursday. This could be worrisome for Rays fans, as Percival was already experiencing tightness in the hamstring last week, so he possibly could of made the injury worse in the fall. The ironic part of all this? Ken Rosenthal had just put out an article today saying bullpen health is key for the Rays, especially with Percival.