Campos, 24, made his Major League debut with the D-backs on August 27 vs. Reds and worked 5.2 innings, allowing 3 runs (2 earned) on 4 hits and 2 walks with 4 strikeouts. Campos was acquired from the New York Yankees on July 31 for RHP Tyler Clippard. This season, he is 10-5 with a 3.26 ERA (51 ER in 141.0 IP) in 24 combined starts with Mobile, Triple-A Scranton/Wilkes-Barre, Double-A Trenton and Single-A Adv. Tampa.
The "corresponding move tomorrow" will, it appears be the promotion of Shelby Miller back from Reno into the major-league rotation. With Zack Godley going down to the bullpen, that necessitates an arm to be dropped from there, and Vicente Campos was the last man in. With a weekend series against the Rockies, you could perhaps have made the case that carrying an extra reliever might not have been a bad thing, but with an off day on Thursday before the series, that should mean all arms will be well rested when Arizona goes into Denver.
Campos did make a decent enough first impression, considering he was promoted from Double-A. He didn't overpower anyone in his debut, but did throw strikes, and certainly helped save the bullpen. As noted at the time, it was the second-longest debut relief outing in the National League since 1980. He could be an interesting arm for long relief in the Josh Collmenter bullpen role next year, though Godley appears the favored candidate at this point.