The Diamondbacks selected Gilbert from Triple-A Reno on Saturday.

EDGE Analysis

Gilbert holds an unimpressive 5.67 ERA and 1.39 WHIP through 54 innings in the minors this season, but he will be called upon to bolster the D-backs' pitching staff. It's unclear whether Gilbert will be used out of the bullpen -- as he has been most of this season in Reno -- or join Arizona's rotation, but it would be wise to curb expectations for the 29-year-old lefty either way. Kyle Lewis was optioned to Triple-A to clear a spot on the active roster, and Drey Jameson (elbow) was transferred to the 60-day IL to open a 40-man spot.