"It sucks just watching, and I feel like I've been doing that for a long time," Dahl, who has been plagued with injuries, said. "So I just want to come back and help the team."
Dahl said he has been running for about two weeks, and on Wednesday, he ran on the warning track for curves and agility drills. The next step will be taking reads in the outfield. Then, he'll go to Triple-A Albuquerque for a rehab assignment, although he doesn't know exactly when with the All-Star break coming up.
"I think we're just going to progress and see where it goes," Dahl said. "I didn't really know what to expect, so I took it day by day. I don't know if I'm ahead of schedule, but Doogie [Rockies head athletic trainer Keith Dugger] thinks I am, so that's good."
Shaw activated Right-handed reliever Bryan Shaw was activated from the 10-day disabled list (right calf strain) on Wednesday, with left-hander Jerry Vasto optioned to Triple-A.
In Albuquerque for rehab, Shaw pitched two innings. On Friday, he gave up two hits, two runs and one home run. On Sunday, his second outing, he fared much better, with three ground balls and only one walk.
"We saw a couple of things that we worked on with his delivery and mechanics things that looked to be a little more in line with what we think he needs to do, and he agrees," Rockies manager Bud Black said. "I think just the overall pitch qualities in those two outings is where it needs to be."
Black said that the majority of Shaw's pitches this season -- the first of a three-year, $27 million deal -- have been up in the strike zone. The emphasis, even before Shaw was put on the DL, was keeping the ball down.
"Our expectations are that when he pitches with us, whenever that might be," Black said, "the ball will be down."
Dunn to receive PRP injection Left-handed reliever Mike Dunn, on the disabled list with a left-shoulder AC joint inflammation, said he will receive a platelet-rich plasma injection on Thursday morning in hopes of saving his season.
"I had a couple of options, and this was the one that we felt would get me back this year," Dunn said.
With arthritis buildup in his AC joint -- at the top of his shoulder -- Dunn was feeling pain with his pitching motion. He received cortisone treatment, but it only lasted 3 1/2 weeks.
After the injection -- which promotes healing of injured tendons, ligaments, muscles and joints -- Dunn won't be able to throw for 1 1/2-2 weeks, then he'll work back into it.
Rosscup claimed by Dodgers The Dodgers claimed left-handed pitcher Zac Rosscup on outright waivers from the Rockies on Wednesday.
Rosscup, 30, has yet to pitch in the Majors this season, landing on the 60-day disabled list at the beginning of the season with a blister on his left middle finger. He has made 10 relief appearances with Triple-A Albuquerque and has lowered his ERA to 1.08, giving up one run over 8 1/3 innings.
Over the course of his career, Rosscup has a 3-1 record and a 5.30 ERA in 71 big league games (54 1/3 innings). He has limited left-handed hitters to a .136 batting average, the third-lowest batting average against left-handers among active pitchers.