Frank Morgan played 5 different roles in the movie: a guard, a professor, a gatekeeper, a cabbie & this
[DOC] [TLE] Today I learned that Professor Marvel from The Wizard of Oz was ... [PAR] Mar 17, 2016 ... Morgan's best remembered film performance, playing five roles, is in The ... he 
played the carnival huckster "Professor Marvel", the Gatekeeper at ... by "The 
Horse of a Different Color", the Guard who initially refuses to let ... Frank Morgan 
as Professor Marvel / The Wizard / Doorman / Cabbie / Guard / Doctor.