Canelo Alvarez's trainer, Eddy Reynoso, confirmed Tuesday via social media that he would work with Andy Ruiz for his next fight.
"Welcome to the team Andy. We are going to do well," Reynoso captioned an Instagram post.
Reynoso also trains former featherweight titlist Oscar Valdez, former bantamweight Luis Nery and lightweight sensation and 2017 prospect of the year Ryan Garcia.
Reynoso will be Ruiz's third Mexican trainer in recent years after Abel Sánchez and Manny Robles.
Ruiz made history on June 1 by dethroning Anthony Joshua via knockout in seven rounds, becoming the first Mexican heavyweight champion. That night, Ruiz took the WBA, IBF and WBO belts.
Ruiz's first defense was a rematch with Joshua in December in Saudi Arabia and the Mexican fighter was visibly out of shape, losing by unanimous decision. A few weeks after relinquishing the belts, Ruiz parted ways with Robles.
Reports linked Ruiz with Teddy Atlas as his next trainer, but during the coronavirus pandemic the former heavyweight champion and Reynoso began talks and finally reached an agreement.
Reynoso, who was named 2019 trainer of the year by the Boxing Writers Association of America, established his boxing camp in San Diego. He told ESPN last month that he would be up for the task of training Ruiz.
"We're ready to work with any fighter," Reynoso said. "It would also be an honor to work with the first heavyweight champion of Mexican descent."
Ruiz, 30, expects a return to the ring between August and September, with Chris Arreola or Dominic Breazeale as his probable next opponent.