i saw l3will's post after I had typed my reply. Thanks for posting the Cases.
The key to this case is that he was moving away from the player who made contact. If in that same case B2 comes up from the secondary and makes legal contact with the A player who is running towards B2, do you still have a foul?
A was clearly not blocking, but he also wasn't past or moving away from B2 in this case. I would think there is no foul on B2. Just because he got past B1 doesn't mean B2 can't come up and make contact.
BTW, I shouldn't leave my books in the car during work
