1. Early life and background
John Alfred Dunn was born on 21 June 1944.
2. Playing career
Dunn's professional football career saw him play as a goalkeeper in the Football League, most notably with Chelsea.
2.1. Club career
Dunn's club career began with his professional signing with Chelsea.
2.1.1. Chelsea
Dunn signed professional forms with Chelsea in January 1962, joining from their junior or youth team. He spent four years at the club, primarily serving as an understudy to the prominent goalkeeper Peter Bonetti.
3. Playing style and assessment
John Alfred Dunn was regarded as a sound and reliable goalkeeper. His role at Chelsea involved learning from and backing up Peter Bonetti, indicating his dependable, albeit secondary, position within the team during his time there.