His great-great grandfather was the original founder of Baylor
University.
In one scene from Sands of Iwo Jima (1949), combat veteran Sgt. Stryker (John Wayne) instructed bumbling recruit Pvt. Choynski (Baylor) on the correct way to march and hold a rifle. In real life Baylor served in the United States Marine Corps and had fought in the battles of Saipan and Tinian in World War II.
His fight with Robert Ryan in The Set-Up (1949) is still considered to be one of the very best ever choreographed boxing scenes in motion picture film history.
Following World War II he began professional boxing in 1947 with a record of 52-5 as an amateur and 16-8-3 as a professional.
Attended Washington State on an athletic scholarship.
Two of his credits were written by Harlan Ellison: he played a policeman in the Star Trek episode "City on the Edge of Forever" and a robot in the film adaptation of A Boy and His Dog.