Juan Rivera (hamstring) is expected to begin a minor league rehab assignment in the next few days. Rivera was told earlier this month that his ruptured left hamstring tendon would need around two months of rehab. But he's well ahead of schedule and could return to the Dodgers' starting lineup within four weeks of the initial injury. The 33-year-old outfielder was hitting .247/.276/.358 with two home runs and 13 RBI.