I don’t think anyone has so thoroughly dominated a celebrity impression the way Will Ferrell has dominated the Harry Caray impression. The evidence: no one actually impersonates Harry Caray anymore. They all impersonate Ferrell doing Caray. Like Ryan Dempster and Derek Holland did at the MLB Fan Cave recently:
Not bad for baseball players. But at some point Will Ferrell is gonna have to apologize for unleashing that on the public.