Yilber Díaz: Everything you need to know

The Diamondbacks optioned Diaz to minor-league camp Thursday, Alex Weiner of ArizonaSports.com reports. Diaz was touched up for four runs on three hits and two walks over 1.2 innings this spring. The righty shifted to a relief role at Triple-A Reno last season and will have to harness his control (73 walks in 57 minor-league innings in 2025) before the Diamondbacks consider him for their bullpen.

Diaz allowed two earned runs on five walks over one inning of relief Sunday in his appearance for Triple-A Reno. Diaz made his second appearance for Reno since rejoining the squad following a stay at the Diamondbacks' facility in Arizona to work on command issues. Judging by Sunday's effort, the right-hander's wayward command was not solved. The 24-year-old had previously started in each of his first eight appearances of the season with Reno, but both of his last two outings have come out of the bullpen. Arizona might not have completely closed the door on developing Diaz as a starter, but he looks like he'll first need to find some success in a relief role before he's considered for a spot in the Reno rotation.

The Diamondbacks assigned Diaz to Triple-A Reno from the Arizona Complex League on Tuesday, Alex Weiner of ArizonaSports.com reports. Diaz was transferred from Triple-A Reno to the Arizona Complex League May 26 as the Diamondbacks hoped to get Diaz back on track. Prior to that transaction, the right-hander had been issuing an abundance of walks. In an ACL appearance June 7, the 24-year-old allowed two earned runs across two innings, but struck out five and walked none.