Go back and watch the throws he's missing, or is a little off on. I can't speak for all of them, but a lot of them you're missing something between Lee and the receiver.
That pass to Hoppes earlier, that was slightly high (though still catchable), on replay you see a defender in there just barely missing tipping the pass. He threw it a little high to get over the defender. That last drive, the third down pass that was slightly wide, on the replay, you can see if he throws it on the money, he would have hit the ref.