Manny Pacquiao's career at stake in bout against Brandon Rios
"If I see he is slowing down and slipping in the fight, I will be the first one to tell him [to retire]," Roach said. "We have an agreement that I will tell him that and he will retire. I don't see him slipping in the gym at this moment, and he's doing really well. He's fired up and anxious to get back in the ring and I see good things. But if things don't go well, we will talk about retirement."