Gilbert's contract was selected from Triple-A Reno on Tuesday.
He logged a 3.44 ERA, 1.24 WHIP and 50:19 K:BB in 52.1 innings working mostly as a starter at Triple-A, but it's possible he will just be deployed as a long reliever during his first big-league stint. The 27-year-old southpaw spent the first five seasons of his career pitching in the minors as part of the Phillies' organization before latching on with Arizona this year.