On November 27, 2021, a 28-year-old George Kambosos Jr. (19-0, 10 KOs) got a shot at the WBA (Super), IBF, WBO, and The Ring lightweight titles held by 24-year-old American boxer Teófimo López (16-0, 12 KOs).
Kambosos Jr. came in to the fight on a 19-fight win streak with a 52% KO rate, and was fighting after a gap of 1 year and 27 days. López was on a 16-fight win streak with a 75% KO rate, and fighting after a layoff of 1 year, 1 month, and 10 days.
George Kambosos Jr. defeated Teófimo López via split decision and wins the WBA (Super), IBF, WBO, and The Ring titles — in his first world-title fight. Kambosos Jr. improves his record to 20-0, while López adds a loss to his record at 16-1.
On July 22, 2023, a 30-year-old George Kambosos Jr. (20-2, 10 KOs) and a 33-year-old British boxer Maxi Hughes (26-5-2, 5 KOs) met in the ring in a lightweight bout.
Kambosos Jr. came in to the fight on a 2-fight losing streak with a 45% KO rate, and was fighting after a gap of 9 months and 6 days. Hughes was on a 7-fight win streak with a 15% KO rate, and fighting after a layoff of 9 months and 28 days.
George Kambosos Jr. defeated Maxi Hughes via majority decision in the 12-round lightweight fight. Kambosos Jr. improves his record to 21-2, while Hughes adds a loss to his record at 26-6-2.
On October 16, 2022, George Kambosos Jr. and Devin Haney met again in an immediate rematch.
Kambosos Jr. came in to the fight on a 1-fight losing streak with a 47% KO rate, and was fighting after a gap of 4 months and 11 days. Haney was on a 28-fight win streak with a 53% KO rate, and fighting after a layoff of 4 months and 11 days.
Devin Haney defeated George Kambosos Jr. via unanimous decision in the rematch and successfully defended his WBA (Super), WBC, IBF, WBO, and The Ring lightweight titles. Haney improves his record to 29-0, while Kambosos Jr. adds a loss to his record at 20-2.
On October 13, 2017, a 24-year-old George Kambosos Jr. (12-0, 6 KOs) and Krai Setthaphon met in the ring in a lightweight bout.
Kambosos Jr. came in to the fight on a 12-fight win streak with a 50% KO rate, and was fighting after a gap of 5 months and 7 days.
George Kambosos Jr. stopped Krai Setthaphon via TKO in the 9th round. Kambosos Jr. improves his record to 13-0 (7 KOs)
On June 5, 2022, the 28-year-old WBA (Super), IBF, WBO, and The Ring lightweight world champion, George Kambosos Jr. (20-0, 10 KOs), faced a 23-year-old American boxer Devin Haney (27-0, 15 KOs), in a title defense fight.
Kambosos Jr. came in to the fight on a 20-fight win streak with a 50% KO rate, and was fighting after a gap of 6 months and 9 days. Haney was on a 27-fight win streak with a 55% KO rate, and fighting after a layoff of 6 months and 1 day.
Devin Haney defeated George Kambosos Jr. via unanimous decision and wins the WBA (Super), IBF, WBO, and The Ring lightweight world champion — and becomes the undisputed lightweight world champion. Haney improves his record to 28-0, while Kambosos Jr. adds a loss to his record at 20-1.
On May 6, 2017, a 23-year-old George Kambosos Jr. (11-0, 6 KOs) and a 27-year-old fellow Australian boxer Qamil Balla (11-0-1, 5 KOs) met in the ring.
Kambosos Jr. came in to the fight on a 11-fight win streak with a 54% KO rate, and was fighting after a gap of 5 months and 4 days. Balla was on a 11-fight win streak with a 41% KO rate, and fighting after a layoff of 1 month and 18 days.
George Kambosos Jr. defeated Qamil Balla via unanimous decision in the 10-round fight. Kambosos Jr. improves his record to 12-0, while Balla adds a loss to his record at 11-1-1.
On April 9, 2014, a 20-year-old George Kambosos Jr. (4-0, 2 KOs) and Akrapong Nakthaem met in the ring.
Kambosos Jr. came in to the fight on a 4-fight win streak with a 50% KO rate, and was fighting after a gap of 2 months and 11 days.
George Kambosos Jr. stopped Akrapong Nakthaem via TKO in the 1st round. Kambosos Jr. improves his record to 5-0 (3 KOs)
On May 5, 2018, a 24-year-old George Kambosos Jr. (13-0, 7 KOs) and Jose Forero met in the ring.
Kambosos Jr. came in to the fight on a 13-fight win streak with a 53% KO rate, and was fighting after a gap of 6 months and 22 days.
George Kambosos Jr. stopped Jose Forero via KO in the 1st round. Kambosos Jr. improves his record to 14-0 (8 KOs)
On July 15, 2018, a 25-year-old George Kambosos Jr. (14-0, 8 KOs) and JR Magboo met in the ring.
Kambosos Jr. came in to the fight on a 14-fight win streak with a 57% KO rate, and was fighting after a gap of 2 months and 10 days.
George Kambosos Jr. stopped JR Magboo via TKO in the 2nd round. Kambosos Jr. improves his record to 15-0 (9 KOs)
On November 22, 2013, a 20-year-old George Kambosos Jr. (2-0, 1 KO) and Michael Correa met in the ring in a lightweight bout.
Kambosos Jr. came in to the fight on a 2-fight win streak with a 50% KO rate, and was fighting after a gap of 3 months and 5 days.
George Kambosos Jr. stopped Michael Correa via TKO in the 6th round. Kambosos Jr. improves his record to 3-0 (2 KOs)