Dubbed 'The Red Dragon', Welshman Bill Harris is credited for scoring one of Boro's fastest-ever goals, netting after just 11 seconds against Shrewsbury in 1962.
Harris was a then-record fee for Boro when he made the switch from Hull City to Teesside, costing £18,000.
Famed for his thunderbolt shot, Harris was moved to inside forward as his career progressed, scoring 72 goals in just under 400 matches for Boro.
One of those 72 strikes was our second-fastest goal ever, when Harris took just 11 seconds to breach the Shrewsbury goal in a 5-1 victory in the FA Cup.
Harris, capped by Wales six times, rarely missed a game for Boro, playing in 127 consecutive league fixtures from September 1954 to September 1957.
Playing on beyond his 36th birthday, Harris eventually departed Boro for Bradford City in 1965 as player-manager. He would return to the North East to coach Stockton.