Barring a setback, Chatwood said he should be the Rockies' starter Friday against the Phillies at Coors Field.
"I think that's the schedule so far," Chatwood said. "So if all goes well, I think that's the day I'll be throwing."
Colorado does not have a clear starter penciled in for Thursday, so there's also a chance that he returns earlier.
After starting the year with Triple-A Colorado Springs, Chatwood has a 2.14 ERA and 3-1 record through six starts. The 23-year-old was a perfect 2-0 with a 1.53 ERA in May before picking up his first loss of the year in his lone June start against the Reds. He surrendered just one earned run in Cincinnati before leaving the game.
Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. Ian McCue is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.