The game was rescheduled for July 30 at 7:35 p.m. as part of a split doubleheader. The first game starts at 1:35 p.m.
The rainout pushed Mitre (1-1) and Myers (1-0) back a day and they are expected to pitch on Sunday.
It was the second home rainout this season for the struggling Phillies, who have lost three of four after a 4-2 road trip. Philadelphia is just 2-8 at home.