Prime BJ isn't known for his stopping power. But it seems that no matter what weight class he's fighting against, he manages to hurt or bloody his opponents even if he ends up losing. Even 220 lb Machida had to respect his striking. So considering that BJ was a natural featherweight who had the muscle mass and reach of a 135er, how in the world did he maintain power so far up the scale? And does this make him one of the hardest hitting P4P? This may also be a testament to how much MMA has evolved. Back in the day, BJ was able to hurt and KO all-time great welterweights. But nowadays, Conor doesn't seem like he has enough power for 170, even though he tore through 145. The sport has changed.