Sep 18, 2009 8:31 AM EST

Phillies reliever Chan Ho Park will miss two to three weeks with a strained right hamstring.

The Phillies are hoping that Park will be ready to contribute by the postseason, but if he is out for three weeks the Division Series might be a stretch.

Park is 3-3 with a 4.43 ERA in 45 games this year. He left Wednesday's win over Washington after pitching a scoreless eighth inning.

Via ESPN