Mets pitcher Kodai Senga felt tightness in his right triceps during a minor league rehab outing and won't pitch during the regular season. Mets manager Carlos Mendoza said Sunday the 31-year-old right-hander might throw a bullpen session and remains a possibility for the postseason.

Mets pitcher Kodai Senga felt tightness in his right triceps during a minor league rehab outing and won't pitch during the regular season.

Out since July 26 with a high-grade calf strain, Senga had hoped to return during the Mets’ final road trip before the postseason as either a short-inning starter or as a reliever. He threw 15 pitches during his first and only rehab start Saturday with Triple-A Syracuse, striking out two without giving up a hit while issuing one walk.