The first time Yasiel Puig strained a hamstring, he missed 38 games. When he suffered essentially the same injury to the other hamstring, his right, a few months later on Aug. 27, the Dodgers had just 36 games left in their schedule

On Friday, Dodgers manager Don Mattingly admitted the team is uncertain whether Puig would return by the end of the regular season.

Puig traveled to Arizona on Friday to begin the lengthy process of rehabilitating his hamstring.