Kambosos jnr started his career on May 2013. Although still relatively close to the start of his career, his record stands at 7 wins and will hopefully continue to rise. The longest win streak that Kambosos jnr has ever recorded was between May 2013 and December 2015 when it totaled 7 wins. Kambosos jnr's longest KO streak is 1 fights long.
An explosive pro debut saw Kambosos jnr face Jayson Mac gura in a 6 round debut fight. George became only the 10th person to stop Mac gura shy of the full distance, stopping him in the 2nd. Kambosos jnr continued on his successful journey by fighting and beating his next 4 fights.
Next was Michael Correa on November 22nd, 2013 where Kambosos jnr took the win continuing his unbeaten streak. Correa was a worthy challenger but Kambosos jnr was too much and became the first person to stop Correa via TKO during round 6.
Next was Paitoon Jaikom on January 29th, 2014 where Kambosos jnr took the win continuing his unbeaten streak. In 2014 Kambosos jnr fought his next opponent Paitoon Jaikom and defeated him via UD. Kambosos jnr was the 2nd person to go the distance with Jaikom. Another win followed for Kambosos jnr taking his win tally to 5 wins.
Kambosos jnr then went on to fight and beat Robert Toomey on August 29th, 2014 maintaining his unbeaten record. Kambosos jnr was the 9th person to beat Robert Toomey where he showed his talent as a technical boxer, beating him over 10 rounds in his 6th professional fight.
George Kambosos jnr retained his unbeaten record in his most recent fight by beating Joebert Delos reyes on December 12th, 2015, increasing his record to 7 wins. Taking his total win streak to 7 wins, Kambosos jnr defeated Delos reyes in the 12 round fight. The win came via KO in the 4th round. Kambosos jnr was the 6th to stop Delos reyes.