 Guy shot to national fame during the then non-league club's spectacular 1975 FA Cup run, initially keeping a clean sheet as the Dons knocked out First Division Burnley at Turf Moor in the third round, thus becoming the first non-league club in a century to beat a First Division team on their own ground.But it was in the fourth round that Guy became a Dons legend, with a heroic display at Elland Road, not only keeping another clean sheet but, most famously, saving a Peter Lorimer penalty to earn Wimbledon a replay against reigning English Champions, Leeds United.In the replay, he was again superb and was eventually only beaten by a single deflected own goal.