Murphy appeared on the ` ` SNL '' 40th episode on Sunday . Norm Macdonald said he tried to convince Murphy to play Cosby . He said Murphy was ` ` to kick a guy when he 's down ''
Murphy appeared on the `` SNL '' 40th anniversary show Sunday . Norm Macdonald said he tried to convince Murphy to play Cosby . He said Murphy refuses `` to kick a man when he 's down ''