The Mets optioned Pintaro to Triple-A Syracuse on Tuesday.
Pintaro's stay with the big club lasted just one day, with the right-hander striking out four batters and giving up two earned runs on three hits over 3.2 innings of relief in Monday's 12-0 loss to the Reds. He gave up his spot on the Mets' active roster to right-hander Kodai Senga (spine), who was reinstated from the 15-day injured list ahead of his start Tuesday.