crap, now I'M confused
When guarding a player without the ball, time and distance are a factor for LGP, and based on OP, guard had LGP with plenty of time and space for A5 to move out of the way. I don't think we can penalize B5 with a block/no call for A5 crashing into him when A5 has his head turned. I would have a TC foul on A5 b/c B5 established LGP with enough time/distance for A5 to move, but A5 did not.