Diaz struck out three batters in 1.1 perfect innings to pick up his 29th save of the season in Wednesday's 9-6 win over the Braves.
The volatile closer appears to be back in top form again after staggering to a 12.46 ERA and 3:6 K:BB in his previous five appearances. The Mariners are only a game out of the second wild-card spot in the AL, so if Diaz runs into another rough patch down the stretch, the team may be forced to choose between developing its young fireballer and finding a more stable option to handle ninth-inning duty for their playoff push.