Foul or No Call?

[jdw3018]

First, if he lost the ball on the way into the lane, then it can't be a PC foul.

Second, it all depends on what happened with the ball, what kind of contact there was, etc. It doesn't sound like stepping on a foot or not had much to do with it if he was out of control. If the ball went OOB before the contact, then you most likely have a no-call, because your only other option is an intentional technical foul. If the player he ran into had no shot at the ball, wouldn't have been in position to defend a player from A who got the ball, and the contact wasn't severe, I'd probably lean toward a no call. If the contact was severe or B1 was put at a disadvantage in either getting the ball or in defending the player who did get the ball, then I've got a foul on A1.

If calling a foul, it would be a common foul, which may or may not be a TC foul based on what happened with the ball after he lost it and before contact was made.

Edit: Important note - if this is a bang-bang play and the contact would have been an easy PC foul if the player still had the ball, it probably should be called here, though it would be a TC foul if the ball hadn't been gathered by B.