The Texas Rangers have likely lost 40% of their starting rotation for the season.
Martin Perez has been diagnosed with a partial tear of the UCL in his left elbow. He can try rehabbing it, which would mean that he might be back in 10-12 weeks, or he could undergo Tommy John surgery. Even going the rehab route may not work, and he might need Tommy John surgery anyway. If he undergoes T-J surgery, he is likely out until the second half of the 2015 season.
Matt Harrison, meanwhile, apparently has a back condition which could require spinal fusion surgery. If he undergoes spinal fusion surgery, his career is in jeopardy.
Both pitchers appear, most likely, to be out for the season. This is a crippling blow for the Rangers, who are, of course, still missing Derek Holland.
I don't really have anything else to say about this. This is about as bad as things can get, as far as this team's prospects go. The chances of this team doing much of anything in 2014 have just cratered.