Though the Rangers' pitching problems appear to stem from their weak bullpen, that's not the only area they're looking to improve. The Rangers would like to upgrade their rotation this summer, according to Jon Paul Morosi of FOX Sports (on Twitter).
Rangers starters rank 12th in MLB with a 3.71 ERA (3.86 xFIP) and only seven clubs have counted on their starters for more innings than Texas (524 1/3). C.J. Wilson, Alexi Ogando, Matt Harrison, Derek Holland and Colby Lewis have started all but three of the Rangers' games this year.
GM Jon Daniels has been open about his interest in relief pitching, but this is the first indication that he'll be searching for starters as well. Here's a list of potentially available starters for Texas.