According to Major League sources, Cotts and Frasor stand the best chance of being moved by the Rangers before July 31.
Cotts is 2-5 with a 3.65 ERA on the season. He has allowed four runs in his last eight games but still has a 2.48 ERA in his last 31 games. Cotts is likely to have some kind of market because there is always a need for left-handed pitching in the majors.
Frasor is 1-1 with a 2.86 ERA in 36 appearances this season despite having allowed runs in three consecutive outings. He has held left-handers to a .220 batting average while right-handers are hitting .250.
Mendez, 23 was called up on Monday after going 0-1 with a 4.02 ERA in 25 relief appearances at Triple-A Round Rock. He missed the final four months of last season while dealing with a stress fracture in his right elbow and was brought along slowly in Spring Training.
T.R. Sullivan is a reporter for MLB.com Read his blog, Postcards from Elysian Fields and follow him on Twitter @Sullivan_Ranger. Grace Raynor is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.