Triple-A Syracuse placed Pintaro on its 7-day injured list Friday due to an unspecified injury.
Pintaro may have sustained the injury in his most recent appearance Wednesday, when he covered two innings out of the bullpen in one of the Mets' doubleheader games versus the Cubs. The right-hander had been serving as the Mets' 27th man for the twin bill and was returned to Syracuse a day later.