The MRI revealed a strain and not a tear, and there is no timetable for Puig’s return.
Puig has not played since April 24 and went on the 15-day disabled list two days later.
He was set to be eligible to come off the disabled list on Sunday, but he re-injured the hamstring on last Friday playing for Class A Advanced Rancho Cucamonga while running to first base.
"I don't know about it starting all the way over," Dodgers manager Don Mattingly said. "It wasn't necessarily good news, but I don't feel we're starting all the way over. The MRI shows a strain and we know there is one.
“Guys always think they can play through stuff. But the reason he goes on the disabled list in the first place is to get healthy."
Puig won’t start running again until at least the end of the week and Mattingly says that another rehab stint for Puig is probably a week away.
In the 14 games that Puig has missed since landing on the DL, the Dodgers are 10-4, including an 11-1 victory over the Miami Marlins on Tuesday.
Puig has only played in 11 of the team’s 32 games this season. He is hitting .279 with two home runs, four RBIs in 43 at-bats for Los Angeles, who have a 5.5 game lead in the National League West over the San Francisco Giants.
- Scooby Axson