Dodgers option RHP Michael Petersen, begin roster maneuvers

(Photo credit: Isaiah J. Downing-USA TODAY Sports)
The Los Angeles Dodgers optioned right-hander Michael Petersen to Triple-A Oklahoma City and outrighted left-hander Jose Hernandez to the minor leagues on Thursday.

The moves could allow the Dodgers to activate right-hander Joe Kelly to the active roster. Kelly, who has not pitched since May 5 because of a right-shoulder strain, has made five rehab appearances in the min