Diaz picked up the save in Friday's 7-4 win over the Marlins, tossing a perfect ninth inning in which he struck out two.
Diaz entered with a three-run lead and retired the side in order, including strikeouts of Jesus Sanchez and Jazz Chisholm. The closer hasn't allowed a run in 12 straight outings (10.1 innings) or blown a save this season. Diaz sports a 2.03 ERA, 0.68 WHIP and 26:4 K:BB through 15 games (13.1 innings) and is quickly becoming one of the best late-inning relievers in MLB.