Just rewatched the HW title fight, am I the only one that thinks Cain faded at the end of the 1st round? IMO Cain was lucky in that JDS seemed to gas even harder, he was dead after 90 seconds into the first (maybe Cain's overhand right caused this, but JDS said it didn't after the fight, that it was the grappling that ruined him).
Seriously by the middle of the second round they are both gassed. Cain's arms are rubber by the end of the 2nd round not just less power but slower as well, so I'm not buying the Diaz-esque only use 50% power theory of Rogan, I think Cain would have finished JDS there if he could have, but he knew his tank was gone so he didn't even try. JDS couldn't run up a flight of stairs at that point, leaning against the cage, hand by his waist even when Cain is making separation to throw. Either Cain has no killer instinct (not true) or he simply didn't have the energy to end it (my theory).
"Cardio" Cain won via slightly better cardio, but I think they both showed bad cardio in this fight. Without the Couture style wall lean it would have ended up looking like Alexander vs. Kimbo.