Rangers’ Kumar Rocker has positive live bullpen session, inches closer to rehab assignment  Dallas NewsKumar Rocker (shoulder) expected to begin rehab assignment this week  FantasyProsThe Rangers are about to have an enviable problem with its starting rotation  Nolan WritinKumar Rocker Injury: Rehab assignment imminent  RotoWireRangers’ Kumar Rocker appears to have crossed final hurdle to be cleared to pitch again  Dallas News