Diaz ended an eighth-inning, bases-loaded threat Tuesday with a four-pitch strikeout against the Tigers.
Diaz entered with runners in scoring position and two out, trailing 4-2. He hit his first batter, but then got out of the jam to keep the team within striking distance. It was a big moment for the 22-year-old, who is the organization's top pitching prospect. Diaz was converted from being a starter earlier this year because he never could develop an adequate third pitch to go with his high-90s fastball and power slider. Those two pitches should work in relief, though. He's shown promise in limited work since his early June callup, pitching eight innings (seven appearances) and allowing two runs with 12 strikeouts and three unintentional walks.