David Robertson earned his ninth save of 2014 as the Yankees beat the Cubs 4-2 in 13 innings on Wednesday. Robertson surrendered a one-out single to Welington Castillo, but then retired Nate Schierholtz on a flyout to shallow right field and Jeff Baker via a swinging strikeout. Robertson owns a dominant 1.42 ERA, 0.63 WHIP, and 17/2 K/BB ratio in 12 2/3 innings this season.