Eldon Quick (born April 4, 1937 in San Joaquin County, California) is an American character actor. He is an alumnus of the American Shakespeare Festival and has numerous stage, screen, and television roles to his credit.Quick's best-remembered television character is the bureaucratic Captain Sloan from two early episodes of M*A*S*H ("Payday" and "The Incubator"), which he reprised as Captain Pratt in "The Late Captain Pierce".