NEW YORK -- T.J. Rivera's rehab from Tommy John surgery hit a snag on Friday, when the infielder experienced discomfort in his right arm during a game at Triple-A Las Vegas. The Mets planned to reevaluate Rivera on Saturday to determine if they must shut down his Minor League rehab assignment.
Recently shifted from Class A Advanced St. Lucie to Las Vegas, Rivera was in the midst of his first game at that level when he felt something in his arm.
"That's why they felt the need to take him out of the game," Mets manager Mickey Callaway said.