Ali-Walsh, 24, began training in MMA in 2020, at the renowned Xtreme Couture gym in Las Vegas. He will make his promotional debut in November on the undercard of the 2022 PFL Championship event.
“I want to thank Professional Fighters League for their support and confidence in me,” the Chicago native said.
“I have a legacy to live up to, a legacy that my grandfather began, that my brother [Nico] and I continue.
“I chose to continue that legacy here in the Professional Fighters League. My one and only goal is to one day become a PFL world champion.”
PFL CEO Peter Murray added: “The Professional Fighters League is committed to growing the league and the sport of MMA. It is incumbent upon us to look for the future stars of our sport.
“We have found one of those stars in Biaggio. We are excited to watch Biaggio’s journey from amateur to professional on the world stage with the PFL.”
Ali-Walsh’s brother Nico, 22, is a professional boxer who competes at middleweight and is undefeated.