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.[1]
Coaching career
From 1926 to 1938, Horrell was an assistant coach for the UCLA Bruins.[1] He then served as the head coach from 1939 to 1944, compiling a 24–31–6 record. His 1942 UCLA Bruins team lost to Georgia in the 1943 Rose Bowl. He was the first coach to lead a UCLA team to defeat the rival USC Trojans in what became the UCLA–USC rivalry.