Masahiro Tanaka has a Grade 1 hamstring strain

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Yankees starter Masahiro Tanaka suffered a Grade 1 strain of his hamstring when running the bases on Friday against the Mets, ESPN’s Buster Olney reports. The Yankees are hoping he only needs to miss one start. He was scheduled to pitch on Wednesday in Toronto against the Blue Jays, but Ivan Nova will start in his place.

Tanaka took two at-bats during Friday’s start, reaching base on a fielder’s choice after a sacrifice bunt attempt in the second inning and weakly grounding out in the fifth. It’s likely that the injury occurred on the bunt play.

Tanaka, in 23 starts this season, has a 3.38 ERA with a league-leading 0.99 WHIP and a 136/26 K/BB ratio across 149 innings.