Clay O'Brien's full name is Clay O'Brien Cooper from Arizona. He left acting to do his true love. Rodeo cowboy
He became 7 time team roping WNFR World Champion.
His numerous acting roles are on Little House On The Prairie, The Apple Dumpling Gang, Gunsmoke and Wonderful World of Disney. Clay was one of John Wayne's favorites as being a true cowboy for what he have done. Clay's brother also acted as well. Sam O'Brien also in the movie The Cowboys with his brother and John Wayne. He played Jimmy Phillips.