ARLINGTON, Texas (AP) -Rangers left-hander Eddie Guardado was placed on the disabled list retroactive to April 5 with a sore shoulder on Saturday.
Right-hander Luis Mendoza (blister on right middle finger) was activated from the DL and will start Saturday night's game against the Toronto Blue Jays.
The 37-year-old Guardado is attempting to comeback from Tommy John surgery in 2006. He has made two appearances with the Rangers this season.
``It's frustrating because I get where I want to be and then I have this setback,'' Guardado said. ``It's not fun. But I didn't want to be stupid. I want to be smart about this.''
The Rangers are battling injuries in the bullpen. Right-handers Dustin Nippert (shin) and Jamey Wright (strained oblique muscle) have nagging ailments, and C.J. Wilson is the only left-hander in the Texas bullpen with Guardado sidelined.
Texas is expected to call up right-hander Scott Feldman from the minors to start Sunday's game, so another move may have to be made.
``Over the course of the year these things are going to happen,'' Texas manager Ron Washington said. ``We're not crying. We just have to solve the problem that's presented to us.''
Mendoza made one rehab start in Triple-A Oklahoma after going 1-0 with a 2.25 ERA in six appearances with the Rangers last season.

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