The New York Mets face an uncertain decision over Kodai Senga's postseason role after the right-hander faltered in a minor league tuneup.

Senga, who agreed to a rare option to Triple-A Syracuse earlier this month to reset his mechanics, surrendered four runs over 3⅔ innings on Thursday against Lehigh Valley, Philadelphia's Triple-A affiliate.

Manager Carlos Mendoza, asked Thursday if Senga was assured a spot on a potential playoff roster, couldn't give a definitive answer.