Cliff Robertson directed himself in the rodeo picture J.W. Coop, which he wrote with Gary Cartwright and Bud Shrake. It's finally out on DVD, and worth a look if you are a fan of Cliff's. There are some fine moments, especially towards the beginning, but the film also features Cliff's own Dehavilland Moth, a biplane he liked to fly.
I wouldn't say it was the high water mark of his career, but it's obviously a personal film to him and if you are a fan of THE LUSTY MEN or JUNIOR BONNER, it's an interesting comparison, as each updates the rodeo scene in turn.