Clay O'BrienActingMay 6, 1961 (65)Ray, Arizona, USA8Movies4TV Shows12CreditsKnown ForLittle House on the PrairieGunsmokeGunsmokeMarcus Welby, M.D.The CowboysCahill: United States MarshalOne Little IndianThe Apple Dumpling GangHog WildClimb an Angry MountainThe Whiz Kid and the Carnival CaperMackintosh and T.J.Clay O'BrienActingLittle House on the PrairieGunsmokeGunsmokeMarcus Welby, M.D.The CowboysCahill: United States MarshalOne Little IndianThe Apple Dumpling GangHog WildClimb an Angry MountainThe Whiz Kid and the Carnival CaperMackintosh and T.J.
