- Height: 6′3″ / 191 cm
- Reach: 79″ / 201 cm
- Stance: Orthodox
- Возраст: 50 years
- Nationality: United Kingdom
- Residence: United Kingdom, London
- Wins: 44 (33 KO)
- Losses: 19
- Draws: 0
Records:
- Alias: Big Bad John
- Height: 6′3″ / 191 cm
- Stance: Orthodox
- Возраст: 43 years
- Nationality: United Kingdom
- Residence: United Kingdom
- Wins: 26 (17 KO)
- Losses: 8
- Draws: 0
Records:
W
MD 12
- Date: 18.07.08
- Location: Dagenham, Goresbrook Leisure Centre, United Kingdom
rounds
Scorecards: (114 - 111), (114 - 113), (113 - 113)
Photo of the fight Williams vs. McDermott