The Arizona Diamondbacks will be without one of their staff aces for a stretch.
The club placed right-hander Merrill Kelly on the 15-day injured list with right calf inflammation. The move is retroactive to Sunday.
Kelly, 34, is 9-4 with a 3.22 ERA in 16 starts this season. He and Zac Gallen (9-2, 2.84) have been instrumental in pitching the D-backs to the top of the National League West.
It's unclear who will get Kelly's next scheduled start on Thursday.
Ginkel, 29, is 3-0 with a 2.76 ERA in 25 relief appearances with Arizona this season.
Martinez, 21, is 2-0 with a 4.18 ERA in 25 appearances at Reno.