Respected trainer Ronnie Shields is this week's guest on The PBC Podcast. Shields updates fans on his fighters, including undefeated 168-pound titlist David Morrell Jr. who is back in the ring Saturday, April 22, on the Gervonta Davis-Ryan Garcia undercard on SHOWTIME Pay-Per-View, as well as unbeaten WBC World Middleweight Champion Jermall Charlo who is back in the gym and ready to remind the world just how good he is. Also, hosts Kenneth Bouhairie and Michael Rosenthal look back at Brian Mendoza's huge stunning knockout win over Sebastian Fundora and, on this week's Toe to Toe segment, list the Five Greatest Upsets in PBC History.