Alvarez was optioned to Triple-A Round Rock on Friday.
Alvarez was sent back to Round Rock to make room for Jurickson Profar, who was recalled to offer infield depth while Adrian Beltre (ankle) is sidelined. He compiled a 3.27 ERA in 11 innings with the Rangers, though he struggled keeping runners off the bases, posting a 12:9 K:BB and 1.82 WHIP as well. He'll likely return to a middle relief role with the big club when another bullpen arm is needed.