After the crash Keselowski was able to exit the car under his own power and was airlifted to Atlanta Medical Center as a precautionary measure, a report on his Web site, bradracing.com, said.
Keselowski, testing his No. 2 Sprint Cup car for the upcoming road-course event at Watkins Glen International, was awake and alert after the 100 mph crash into a retaining wall and was soon sending messages on Twitter.
"Looks like I'll be OK to race this weekend," he tweeted. "Blue deuce, not so much. I'll keep u posted."
Keselowski has one victory this season on the Sprint Cup circuit, where he stands 21st in points, NASCAR.com said.