Bukauskas was placed on the 15-day injured list by the Brewers on Saturday with a cervical strain.
A cervical strain is also known as whiplash. The right-hander was replaced on the active roster by Colin Rea, with Rea being recalled from Triple-A Nashville in the corresponding transaction. The Brewers placed Bukauskas on the 15-day injured list retroactive to May 17, so the earliest he could return to the Milwaukee bullpen is the start of June.