T.R. Sullivan reports that Eddie Guardado has been put on the disabled list to make room for Luis Mendoza on the 25 man roster.
Mendoza starts tonight, and the Rangers are now without a lefty in the bullpen (other than C.J. Wilson).
The Rangers will have to make another room tomorrow to make room for Scott Feldman, and I guess it is possible that, after Feldman makes his start, they could call up A.J. Murray to replace Feldman, to serve as the bullpen lefthander.