Rangers call up Calhoun, Bibens-Dirkx
The Rangers called up No. 2-ranked prospect Willie Calhoun and right-hander Austin Bibens-Dirkx from Triple-A Round Rock, activated infielder Hanser Alberto from the disabled list and selected the contracts of right-hander Adrian Sampson from Round Rock and left-hander C.D. Pelham from Double-A Frisco.
