Roy didn't have to get hit with that shot

Been a Roy Jones fan since he was in the Olympics, and it's sad to see him going out like this. When he got hit with that overhand right i was in shock and thinking why did you allow yourself to get that careless. When he was moving he was able to stay away from Denis Lebedev power. Early on even when he was on the ropes he tightened up his guard so Lebedev couldn't get through with a big shot and was hitting glove. Why on earth does Roy start getting careless. He easily should have gone the full distance. Why does he leave his guard open like that when early on he had it tight when on the ropes and Lebedev couldnt get in a big shot.