Cotto and Canelo manhandle him. The best he's fought is Mike Alvarado and Pacquiao. He's 2-1 with Mike and 0-1 with Pac. He was en route to a decision loss against Chavez too. He doesn't have the skillset to hang with Cotto or Canelo.
He has the chin to work through the punishment. I think he'd do better against Canelo than Cotto. Cotto's movement would trouble Rios too much, but Canelo is flat-footed enough for Rios to get on the inside. And neither are knocking him out, so no, he doesn't have a death wish.