Glynn, a compositor by trade, was a young right-back who played occasionally for the reserves as an amateur at the start of Wimbledon's journey into the semi-professional Southern League, and more regularly so in the 1966/67 season when he was called up to play for the first team in the 0-0 draw at Met Police in the Premier Midweek Floodlit League.

Limited opportunities behind the Dons ex-England captain Brian Martin saw a move to Sutton United for 1967/68. He flourished there and was part of the United side that made it through to the following season's Amateur Cup final against North Shields at Wembley, alongside ex-Don Rodney Brookes and future Wimbledon manager Dario Gradi.