Bills - lose the player and the red shoulder patch.
Pats - going back to old school. Can't decide if I like it or not.
Ravens - downgrade from current logo
Bengals - Tiger prawn??
Steelers - what's the significance of the three bars? The three rivers? It doesn't work for me.
Texans - would be good if the Chicago Bulls hadn't done it first.
Jags - not much different from current logo
Titans - lose the flowing hair and you might have something, but their current logo is too sick to change.
Broncos - if you were marketing My Little Pony, maybe. That's an abomination.
Chiefs - too complex, and the arrow suggests pointing to the past instead of the future.
Chargers - seriously, what is with these animals curving like shrimp?
Cowboys - No, just no. That's an L.
Giants - is it a logo or a subway system map?
Eagles - another too similar. If you are going to redesign it, then REDESIGN it.
Bears - is it a bear? Is it a wolf? A dog? What is it??
Lions - looks like something from the Lion King or other kids' cartoon. Awful.
Green Bay Packers - interesting. Would never have the fans' buy-in. Now excuse me, I have to go watch a Legendary Pictures movie
Vikings - what the heck is that?? Looks like the king from the LA Kings jersey. Terrible.
49ers - the football at the bottom looks like a zero. Bad idea.
Seahawks - not bad considering the current logo is one of the most awkward in the league. Not much room for a new direction here.