Kodai Senga might be pitching for a spot on the New York Mets’ postseason pitching staff when he takes the mound for Triple-A Syracuse on Thursday night. Senga opened the season with a 1.47 ERA in his first 12 starts but was optioned to Syracuse on Sept. 5 after posting a 5.90 ERA following his return from injury. Mets manager Carlos Mendoza said Senga is not guaranteed a roster spot if the Mets make the playoffs. They entered Thursday 1 1/2 games ahead of the Diamondbacks for the final NL playoff spot. Also, Reed Garrett went on the injured list for a second time in a month on Thursday.