Tennessee-born comedian Sinclair was a favorite stunt double for such 1920s action heroes as
Ken Maynard,
Billy Sullivan and
Reed Howes. Later he wrote gags for
W.C. Fields' comedies ''It's a Gift
and Man on the Flying Trapeze'', and had uncredited walk-on roles in several sound-era films. Sinclair was married to actress
Thelma Hill. ==Death==