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33
9
1
39.5%
Before finishing his career in November 1951 NA boxer O'sullivan built up a record of 33 wins, 1 draws, and 9 losses, starting at age 24 on July 1947 and ending 4 years later at . O'sullivan's longest KO streak is 3 fights long out of his 43 pro career fights.
Staritng his career off in tremendous fashion in July 1947, O'sullivan became the 5th quickest fighter to have ever stopped Wally Basquille. The fight ended in round 1 via TKO stoppage. O'sullivan continued his pro journey, which was mostly successful at this point, by fighting 22 fights following his debut. Fights against boxers such as Richie kid Tanner, Georges Mousse and Johnny Boom followed including 7 times in 1947 and 2 times in 1949.
O'sullivan went into his next fight against Stan Rowan on May 31st, 1948 with a career record of 15 wins. Coming into the fight with high confidence O'sullivan fought his next fight against Stan Rowan on May 31st, 1948. Unfortunately, O'sullivan was outclassed and lost the decision on the judges scorecards taking his record to 15-1-0. 2 wins followed taking O'sullivan's winning streak to 17 wins.
On October 18th, 1948, O'sullivan took on and was defeated by Jackie Paterson meaning his career tally went to 17-2-0. Paterson was a fight too far for O'sullivan and after a rough fight Paterson became the first person to stop O'sullivan in round 7. O'sullivan's win streak of 17 rose to 29 following 12 wins against boxers such as Fernando Gagnon, Bunty Doran, Jackie Paterson and 9 others.
Luis Romero was next in line for O'sullivan where unfortunately, he was defeated on April 25th, 1950 taking his record to 29-4-0. Romero upset O'sullivan in a 15 round fight, stopping him in the 13th round and becoming only the 2nd person to stop O'sullivan. 3 fights followed for O'sullivan who then went on to fight 7th person to stop Jackie Hughes (Round 7 TKO), fought Ray Fitton and fought Bobby Boland amongst others in his next 3 fights.
O'sullivan lost to Vic Toweel in his next fight. Taking place on December 2nd, 1950, O'sullivan's career record after this fight stood at 30-7-0. O'sullivan was stopped by Vic Toweel in the 10th round of a 15 round fight via TKO. It was O'sullivan's 3rd stoppage defeat in his career.
Alex Sinnaeve was the next fight for O'sullivan on October 29th, 1951 and also his next career win. O'sullivan was the 15th person to beat Alex Sinnaeve where he showed his talent as a technical boxer, beating him over 8 rounds in his 42nd professional fight.
The next defeat of O'sullivan's career came against Ronnie Clayton on November 20th, 1951. This took his career record to 33-9-1. This turned out to be O'sullivan's last career fight, bringing O'sullivan's 43 fight career to an end on November 22nd, 2018. Clayton was too much for O'sullivan and became the 5th person to stop him.