The Dodgers have been encouraged by Zack Greinke's recovery from a broken left collarbone, and the right-hander is already throwing less than three weeks removed from surgery.

Greinke threw from 90 feet before Monday's game against the Rockies. He had surgery on April 13 and had a metal plate inserted into his clavicle to stabilize the fracture. But that's not prevented him from beginning a throwing program.

"It's still a little achy here and there, but nothing worse than what you would expect, I think," Greinke said. "You try not to have setbacks but at the same time do what you can."

Greinke is likely to be sidelined until mid-June, but the Dodgers are still pleased with his progress.

"I was pretty excited when he walked through the weight room today," manager Don Mattingly said before Monday's game. "He's feeling better. We're getting closer. We'll see if he's sore tomorrow or feels good again."

Greinke suffered the injury during a benches-clearing incident against the Padres on April 11. After Greinke hit Carlos Quentin with a pitch, the outfielder charged the mound and chaos ensued.

Quentin returned from an eight-game suspension on April 23. He said he spoke with Greinke about the incident. Greinke declined comment on Monday.

Greinke also declined to comment on Padres president and CEO Tom Garfinkel, who recently said Greinke hit Quentin on purpose and made remarks connecting Greinke's social anxiety order to a movie character who suffered from autism. Garfinkel compared Greinke to "Rain Man," the autistic character Dustin Hoffman played in the movie. Garfinkel has since apologized for his remarks.