Rockies manager Jim Tracy said after the game that Corpas was scheduled for an MRI at a local hospital and the team would know more about the reliever's status in the coming days. He is listed as day to day.
"He has tenderness on the ligament and also the flexor tendon," Tracy said of Corpas. "Obviously, it'll be something to talk about [Thursday]."
The right-hander, who left the field after allowing a leadoff double to Braves catcher Brian McCann, is tied for second on the team with 56 appearances this season.
Entering the game after starter Esmil Rogers surrendered seven runs on eight hits in 1 2/3 innings, Corpas needed just one pitch to get out of the second inning. But he ran into trouble immediately in the third and finished having allowed three runs on four hits, including a homer, in 1 1/3 innings.
In July 2009, Corpas was shut down for the rest of the season to have bone spurs removed from his right elbow.
He has a 3-5 record this season with a 4.62 ERA, while racking up 47 strikeouts and 22 walks in 62 1/3 innings. He also has 10 saves.
The Rockies are off on Thursday before opening a three-game weekend series against the Dodgers at Coors Field.
Joey Nowak is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.