The 74 year-old was taken ill last month spending time in hospital after overseeing Juan Manuel Marquez’s victory over Mike Alvarado, but was given the green light to be by the side of Vargas in Mexico over the weekend.
Upon making his comeback, Beristain, who is a member of the boxing Hall of Fame said: “I’m sure Rey Vargas is the future of Mexican boxing and that is why I decided to assist him in this fight because it was crucial to his promising career.
“I have many years of non-stop action and I will not quit my passion off boxing,” he added.
Beristain is now awaitng the go ahead to return to his famous Romanza Gym and seems as determined as ever to continue his good work outside of the ring.
With the victory, 23 year-old Vargas improved to 20-0 by scoring his 17th stoppage in the sixth round and has been tipped for big things on the world stage.
Follow on Twitter @PhilDJay for tweets of upcoming news on WBN