York attracted considerable attention in the mid 1950s with his television portrayal of Mike Fink, the flamboyant keelboat operator in two episodes of Disney's hugely popular Davy Crockett miniseries in the episodes "Davy Crockett's Keelboat Race" and "Davy Crockett and the River Pirates." York was cast opposite Fess Parker in the role. The first episode featured a memorable boasting contest and a keelboat race, with Fink's boat named The Gullywumper; in the second, Crockett and Fink join forces to fight a band of river pirates who blame their depredations on local Native Americans.
One of the famous lines form the movie is “Girls run and hide, brave men shiver...I'm Mike Fink, king of the river!”
He also starred as mountain man/fur trapper Joe Crane in two different Disney series, The Saga of Andy Burnett, adapted from the Stewart Edward White novel The Long Rifle and Zorro.