Background
Harrison was born in Leicester, Leicestershire.
Harrison was born in Leicester, Leicestershire.
He played as a centre half. When he left school in 1968 he joined Birmingham City as an apprentice, turning professional two years later. He kept his place for the next game in the absence of Roger Hynd, and played once more the following season in place of Stan Harland.
In the 1972 close season Harrison joined Southend United, where he spent one season and played 18 games in all competitions.
His next club was Yeovil Town of the Southern League. Harrison was again named Player of the Season.
In all competitions, he made 304 appearances for Yeovil Town over a six-year career.
He captained Birmingham"s youth team, and made his debut as an 18-year-old, deputising for Dave Robinson in a 4–1 win at Leicester City on 16 January 1971. In the 1974-1975 season, his second with the club, Harrison was named Player of the Year. The following season, under player-manager Stan Harland whom Harrison had understudied at Birmingham, the club achieved a "runners-up double" in the Southern League and the Southern League Cup, success which prompted invitation into the 1976-1977 Anglo-Italian Semiprofessional Tournament, to play against Italian Serie C teams.