Probably not many have heard of him at this point. His hey day was in the 60s and into the early 70s. He was fairly well known and recognizable I believe in that era. I remember hearing of him from my parents in those days.

He was a very well known character actor, primarily in Westerns 'The Virginian' and 'Wagon Train', and as Billy the Kid in 'The Tall Man'. In the 70's and 80's he appeared in episodes of Quincy ME, Chips, Knight Rider, Magnum PI, Murder She Wrote, Hawaii Five-O and dozens of others. He worked thru the 90s into the 2000s.
Just check out the impressive list of shows he was on:

imdb.com/name/nm0347656/

IIRC, he was the star of the Heart Of Texas Fair and Rodeo in 1961...

Had a good part in The Last Picure Show.

He shined in Return of the Living Dead. RIP.

RIP!