Mostafa Kashe's civil negligence complaint filed Monday in Nevada state court alleges that a ball that the raspy-voiced British singer kicked from the stage at the Caesars Palace resort hit him.
The lawsuit seeks unspecified damages of at least $10,000 plus attorney fees from Stewart, promoter AEG Live and Caesars Entertainment Corp.
Representatives of the defendants didn't immediately comment on the case.
Kashe's attorney, Larry Weinsteen, says Kashe has "substantial" injuries including the loss of the sense of smell.
Stewart is known for hits including "Maggie May" and "Tonight's the Night."