Considering Johnny Manziel isn't officially in the NFL anymore, the title for biggest moron in the league has to go to the Oakland Raiders' linebacker Aldon Smith.
Adding on to his laundry list of bonehead moves which includes a hit and run, vandalism and three separate DUI's, Smith recently uploaded a video of himself smoking a blunt on Periscope in which he arrogantly claims, "they won't know it's me, it's not like I put Aldon Smith." Worth noting, he has shown himself in a number of videos posted on that same Periscope account.
For those who might've forgotten, the league suspended Smith for an entire year last November for violating the league's substance abuse policy, just after the Raiders took a gamble on him.
Naturally, Smith has denied that it's him in the video. In the words of Jay Z, we don't believe you, you need more people.