Tropeano was optioned back to Triple-A Syracuse after serving as the 27th man for Monday's doubleheader against Atlanta, Tim Britton of The Athletic reports.
Tropeano didn't appear in either game of the twin bill and will now return to Syracuse for the time being. The right-hander has allowed just two earned runs across eight big-league innings this season and remains a candidate to rejoin the Mets' bullpen later in the campaign.