Aged 22, Arriaza started his career on January 2013. His unbeaten record stands at 9 wins and shows no signs of stopping anytime soon. The longest KO streak that Arriaza has ever had is 7 throughout his 9 fights and his longest winning streak is 9 wins. This started on January 2013 and came to an end on September 2014.
In a memorable debut Arriaza gained a KO win against Mario Mairena in a 4 round contest, becoming the 5th person to stop Mairena. Arriaza built on his successful start to his career by fighting 5 times in 2013 which included fights against Mario Mairena, Felix Osorio and Mario Perdomo to name just a few.
Eligio Palacios was beaten next on May 17th, 2014 meaning Arriaza could maintain his unbeaten streak. The 6 round fight ended in the 4th round via TKO crowning Arriaza as only the 2nd to stop Palacios.
Next was David Bency on August 23rd, 2014 where Arriaza took the win continuing his unbeaten streak. In 2014 Arriaza fought his next opponent David Bency and defeated him via MD. Arriaza was the 6th person to go the distance with Bency.
Roberto Arriaza went into his latest fight with Edwin Palacios on September 26th, 2014 with 8 wins and he continued this winning streak taking it to 9 wins. The latest fight for Arriaza was expected to be a challenging one, but Palacios was disposed of in 1 rounds as Arriaza moves on to greater things and claims the honour of being first person to have ever stopped Edwin Palacios.