The Arizona Diamondbacks recalled right-hander Cristian Mena to make his major league debut on the road against the Los Angeles Dodgers on Wednesday.
In a corresponding move, the Diamondbacks optioned right-hander Gavin Hollowell to Triple-A Reno.
Mena, 21, is 3-2 with a 4.90 ERA over 16 starts at Reno this season. Acquired from the Chicago White Sox in February for outfielder Dominic Fletcher, Mena has made 79 starts over four minor league seasons, with 20 of those at the Triple-A level.
He is filling the spot in the rotation vacated when left-hander Jordan Montgomery went on the injured list this week with right knee inflammation.
Hollowell, 26, was added to the roster Tuesday but he did not pitch against the Dodgers. He had 32 relief appearances with the Colorado Rockies over the previous two seasons and posted a 6.20 ERA.