Betancourt has battled the injury bug all season. The veteran closer sustained a groin injury and was placed on the 15-day disabled list on June 1. On July 20, he returned to the DL after a bout with appendicitis.
"You come out of the game, it's usually not good," manager Walt Weiss said. "He felt something in his elbow.
"He didn't mention anything about it [before the game]. Raffy has been great in the closer role. He's dealt with a couple of injuries, but he's a warrior."
Michael Radano is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.