Gray (back) has been placed on the 10-day injured list, retroactive to March 29.
Gray dealt with back spasms during camp, but he hopes to build up his pitch count over the next two weeks. According to Bobby Nightengale of The Cincinnati Enquirer, Gray tossed 43 pitches in an intrasquad game Wednesday, so he may only need to complete one or two more outings at the Reds' alternate site before getting the green light for his 2021 debut. Jeff Hoffman and Jose De Leon will join Cincinnati's rotation to begin the year with Gray and Michael Lorenzen (shoulder) sidelined.