[1] Glencross was a finalist at the ABA Championships in 1963 in the class 'A' 7-stone division,[2] and won Scottish amateur titles in 1966 and 1967, and represented Scotland against England in January 1967, defeating Tony Hume.
[1] He won his first twelve fights before suffering his first loss in February 1970 when he lost a points decision to experienced Ghanaian Bob Allotey in Barcelona.
[1] Glencross won his next eleven fights, including a points win over Luis Aisa and a sixth round knockout of former Spanish champion Valentin Loren, setting him up to challenge for José Legrá's European featherweight title in February 1972 at the Bingley Hall in Birmingham, after relocating to the city and signing with promoter Alex Griffiths;[4] Legra retained the title on a split decision.
[1] His bad run continued four months later when he was stopped due to a cut over his left eye is the first defence of his British title against Armstrong in Glasgow.
[1] He made a successful defence of the Scottish Area title later that month against John Gillan,[9] racking up two further wins before facing Vernon Sollas in June.