Gorzelanny collided with Braves catcher Brian McCann while scoring on Roger Bernadina's triple in the third inning on Sunday. Bernadina also scored on second baseman Dan Uggla's wild relay throw, which forced McCann to move up the third-base line and set up the collision with Gorzelanny.
Gorzelanny made a few warmup throws in the bottom of the third inning before leaving the game. Right-hander Henry Rodriguez replaced Gorzelanny and allowed three runs over 2 1/3 innings of Washington's 9-8 loss to Atlanta.
The Nationals said Gorzelanny's status is day to day.
Nationals manager Davey Johnson said he believes Gorzelanny, with the help of an off day on Thursday, can make his next scheduled start against the Dodgers on Friday.
"He's got an extra day, so hopefully he'll be able to make his next start in L.A.," Johnson said.
Information from The Associated Press was used in this report.