His "rapid decline" has been massively overstated. He CLEARLY beat Bradley, maybe not as clearly as the ridiculously biased HBO commentary would have one believe but clearly nonetheless. And he was well on his way to whipping JMM's ass before he got overly aggressive and got KO'd for the ages. Hey, no excuses -- his fault there.
But before that final second of round 6 MP was inches away from stopping JMM. Marquez was hanging on for dear life at that point.