Kikuchi (5-9) took the loss against the Yankees on Tuesday, giving up five earned runs on eight hits over four innings, striking out one and walking three as the Mariners lost 7-0.
Kikuchi tossed a complete-game shutout in his last start Aug. 18, but he followed it up with a dud in this contest, with home runs by Aaron Judge and Brett Gardner accounting for most of the damage against him. The left-hander now sports an uninspiring 5.36 ERA, 1.48 WHIP and 104:46 K:BB across 139.1 innings on the season.