The 24-year-old Ali Walsh, born in Chicago, was a standout running back at Bishop Gorman High School in Las Vegas, he went on to attend the University of California before transferring to UNLV.
Ali Walsh began his MMA journey in 2020 training in Las Vegas at Xtreme Couture.
The grandson of the legendary Muhammad Ali, a three-time world heavyweight champion, and brother of professional boxer Nico, an undefeated middleweight; Ali Walsh will look to add to his family legacy in combat sports.
"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," said Professional Fighters League CEO, Peter Murray.
"We are excited to watch Biaggio's journey from amateur to professional on the world stage with the PFL."
Ali Walsh said: "I want to thank Professional Fighters League for their support and confidence in me. I can't wait to enter the PFL SmartCage.
"I have a legacy to live up to, a legacy that my grandfather began, that my brother 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."
"We are incredibly excited to welcome Biaggio Ali Walsh to the Professional Fighters League," said PFL President of Fighter Operations Ray Sefo.
"I look forward to working with Biaggio and his team as he continues to grow in MMA.
"Biaggio has a world of talent that he will develop right here in the PFL."
The PFL is the first and only MMA league with a true sports-season format where elite fighters from around the world compete in a Regular Season, Playoffs and Championship.
The four competitors in each division who earn the most points in the Regular Season advance to the win-or-go-home Playoffs, followed by the biggest night in MMA - the PFL World Championship - with each winner going home with the $1million prize.
The Professional Fighters League is the No. 2 MMA company globally and features an elite talent roster.
It has live event coverage in 160 countries on leading distribution platforms and delivers a unique, innovative product to MMA fans around the world.