I actually disagree with Missy and General Bulldog.

At least Cotto looked good while he wasn't hurt.
I mean, Cotto actually did things that made good Boxing sense for a while. Even when he was hurt and broken he had enough sense and skill to keep a good jab going.

IMO, Mosley didn't do anything different from rounds 1 to 12. He showed that with inferior athletism, you NEED to rely on you Boxing IQ and to be honest, IMO Mosley has very little.
The only thing that changed was round by round he got weaker and weaker in relation to Manny's superb conditioning.

What I mean is, the knockdown was pretty irrelevant on most accounts.