Here is a list of St. John's best fights. For a list of St. John's losses, refer to "Mia St. John Losses".
On August 14, 2012 Mia St. John faced off against Christy Martin in a super-welterweight bout at age 45. She was coming in with a record of 47-11-2 (18), and Martin was 44 years old and with a record of 49-6-3 (32). St. John won the fight via 10-round unanimous decision.