Born in Plean, then in Stirlingshire, Forsyth was briefly a trainee at nearby Falkirk before joining Junior Football club Shettleston from the east end of Glasgow.
[7] In November 1960, he joined Kilmarnock; at the end of his first season with "Killie", the club gained the runners-up position in the Scottish League Division One.
[8] Earlier in the championship-winning season, Forsyth had been involved in Kilmarnock's first-ever European tie, against Eintracht Frankfurt in the Inter-Cities Fairs Cup.
[11] Campbell immediately replaced Tony Godfrey and settled in quickly at The Dell, with his fine displays between the posts playing a prominent part in "The Saints" successful push for promotion.
[13] With the only other professional 'keeper available being 19-year-old Gerry Gurr who was not considered ready for the First Division, manager Ted Bates signed Dave MacLaren from Wolverhampton Wanderers for a fee of £5,000, despite his having conceded nine goals to the Saints almost exactly 12 months previously.
[13] By the start of the following season, Forsyth had fought his way back to fitness and was preferred to Eric Martin (who had been signed in March to strengthen the side).
Forsyth was unable to re-discover his old form however, and was dropped in October after conceding a goal to Leicester City's 18-year-old goalkeeper, Peter Shilton.