Roy Halladay took a big step toward a return to action on Sunday, throwing off a mound for the first time since having corrective surgery on his throwing shoulder.

Halladay threw 20 pitches, all of them fastballs.

"I don't look at velocity at all right now," said pitching coach Rich Dubee. "I'm looking at his arm path, making sure he gets his arm up where it needs to be. And ever since Day 1, it's been very encouraging. After the surgery his range of motion has been phenomenal."