Diaz pitched a scoreless two-thirds of an inning in Saturday's 8-4 win over the Rangers to record his sixth save of the season.
Diaz earned the save Sunday, allowing no hits and one walk with a strikeout over one scoreless inning against the Angels.
Diaz gave up a hit and struck out two in a scoreless ninth inning Wednesday to record his first save of the season in a 4-1 win over the Phillies.
Diaz (1-1) struck out two over 1.2 hitless and scoreless innings to pick up the win over Philadelphia on Monday.
Diaz (0-1) was charged with the blown save and the loss Saturday against the Nationals. He allowed three runs on two hits and two walks while striking out one batter in one-third of an inning.
Diaz allowed two runs on two hits and struck out one over one inning in Monday's spring game against Oakland.
Diaz (9-6) suffered Saturday's loss, allowing four runs on five hits over two-thirds of an inning to Pittsburgh.
Diaz (9-5) was tagged with the loss and a blown save against the Twins on Wednesday. He allowed three runs on two hits and one walk over one-third of an inning.
Diaz was not available to pitch Saturday when Derek Law recorded the save in a 3-2 win over the Mets, Gordon Wittenmyer of the Cincinnati Enquirer reports.
Diaz allowed three runs on two hits while not retiring a batter in Sunday's 15-7 loss to the Cubs.