Red Sox placed Garrett Whitlock on the 15-day injured list, retroactive to May 25, with left knee inflammation.

Whitlock had a 3.20 ERA in 19 2/3 innings for the Red Sox as their main setup man for Aroldis Chapman, blowing a save on Sunday before sitting out the next two days with the injury. Justin Slaten looks to be the main cog in this pen for holds now, with Jovani Morán potentially joining the mix as well.