Volquez (2-2) escaped a few jams early in the game and then again in the fifth inning. The righty won his second straight start. He allowed one run and six hits, walked two and struck out five.
Halladay is winless in his last five starts, the longest stretch in his Phillies career. His last win was at San Francisco on April 16.
The righty allowed two runs and seven hits in seven innings. He walked one and struck out a season-high 10. It was his 15th career double-digit strikeout game.
