Donaire becoming a dad, not training in person with Garcia (when he never really did anyway), and not watching tape (when he was talking about watching tape before the fight) wins for me.
Haye actually took off his shoe and socks to show his toe LOL. Foreman remains #1 though for a single fight due to the sheer number of excuses, and the amount of time passed by in which he still used them. 20+ years after Zaire "I was about to knock out Ali but I got distracted by my friend in the audience cheering for Ali and by the time I got over it, the moment had passed" Then yet another 10 years after that "I was drugged!"