The Diamondbacks have announced that they’ve selected the contract of lefty Zac Curtis and designated fellow lefty Keith Hessler for assignment. Hessler began the season pitching out of the Double-A Mobile bullpen but was promoted last week. He pitched two scoreless innings against the Cardinals on Tuesday but gave up three runs in an inning against the Rockies yesterday. Hessler also struggled in 12 1/3 innings in the big leagues last season.
Curtis’ promotion is the more unusual of the pair of corresponding moves — it’s not often a team promotes a player to the big leagues who has a 5.23 ERA at Class A+ and no experience above that level. Beyond those superficial numbers, it’s easy to understand the Snakes’ interest in Curtis. He struck out 75 batters in 54 innings at Class A last season and has 22 punchouts against just five walks in 10 1/3 innings thus far this season, and it’s not impossible to imagine a player having big-league success despite a lack of minor-league development if he only has to face batters once per outing. Still, Curtis’ promotion stands out as yet another surprising decision for an Arizona front office that continues to march to the beat of its own drummer.