It was the end of the round though
Ok, let's just say that JMM was a legit threat to KO Manny.
Then, if we're leaving Bradley out because his power is MIA, then we would have to count Brandon Rios as a legit threat to KO Pacquiao (even though Pac totally switched up the gameplan against him), because Brandon Rios has a higher KO ratio than JMM (66% for Rios, 62% for JMM) and pct of wins coming by KO (72% for Rios, and 71% for JMM).
So either way, I believe he's wrong.