The Rays designated Kimbrel for assignment Monday.
Kimbrel will give up his spot on the 40-man roster to right-hander Freddy Peralta, who was acquired from the Mets on Sunday. In 33 appearances between the Mets and Rays this season, Kimbrel has logged a 4.81 ERA and 32:16 K:BB over 33.2 innings. The 38-year-old is a good bet to clear waivers and become a free agent.