Career
He played college football at the University of California, Berkeley, where he was an All-American in 1924 at center. Horrell served as the head football coach at the University of California, Los Angeles from 1939 to 1944, compiling a record of 24–31–6. In 1942, he led the University of California, Los Angeles Bruins to the Pacific Coast Conference title and an appearance in the Rose Bowl.
Horrell was inducted into the College Football Hall of Fame as a player in 1969.
Horrell played as center for the California Golden Bears from 1922 to 1924. During those three seasons, the team went 26–0–3 under head coach Andy Smith.
From 1926 to 1938, Horrell was an assistant coach for the University of California, Los Angeles Bruins. He then served as the head coach from 1939 to 1944, compiling a 24–31–6 record.
His 1942 University of California, Los Angeles Bruins team lost to Georgia in the 1943 Rose Bowl.
He was the first coach to lead a University of California, Los Angeles team to defeat the rival University of Southern California Trojans. lieutenant was University of California, Los Angeles"s first football victory in the University of California, Los Angeles– University of Southern California rivalry.
