Between 1956 and 1960, Corcoran played several different (but similar) characters, each bearing the nickname Moochie. Although he was never a Mouseketeer, Corcoran appeared in three Mickey Mouse Club serials, beginning with Adventure in Dairyland, where he played Moochie McCandless, a farmer's son. This was the first of Corcoran's many Disney credits. He soon returned, as Montgomery (Moochie) O'Hara, in two Spin and Marty serials, The Further Adventures of Spin and Marty and The New Adventures of Spin and Marty.