He attended a rugby-playing school (Alloa Academy) and only began to play football as a teenager, joining local club Sauchie Juniors[1][2] before being brought to Firhill.
Hansen was part of the Thistle team that was relegated in 1970, promoted as lower division winners in 1971 and then defeated Celtic 4–1 in the 1971 Scottish League Cup Final.
He played alongside his younger brother for four seasons, during which the club were relegated in a league restructure in 1975 but bounced back as second-tier champions again in 1976 and finished fifth in the 1976–77 Scottish Premier Division.
Persistent knee injuries dogged his career; with various operations on his cartilage and cruciate ligament ending the possibility of a move to Manchester United,[4][5] whilst also robbing him of the chance to compete in Europe following the League Cup win—eventually forcing his retirement from playing, aged just 27.
[5] Hansen won two caps for Scotland under manager Tommy Docherty, playing against Belgium in a 1–0 victory in a European Championship Qualifier, and against Yugoslavia in a 2–2 draw in the Brazilian Independence Cup.