Diekman (2-2) allowed a run on one hit and one walk while striking out two over an inning as he was handed the loss against the Mariners on Friday.
Diekman pitched the seventh inning for the A's and could not preserve a 3-3 tie. He allowed the go-ahead run to reach on an infield single and would end up giving the Mariners the lead on his second wild pitch of the frame. The left-hander took the loss and now owns a 3.35 ERA, 1.38 WHIP and 51:22 BB:K over 37.2 innings.