[footballref]

Originally Posted by patalia

I am quite certain that you are not the only one. It might help to remember that loose-ball and loose-ball play are not the same thing. Remember, all loose-ball plays will 'originate' behind the LOS, but could end beyond it where a running play may ensue. Loose-balls can occur anywhere on the field. You will only ever have one loose-ball play in any down, but you could have numerous running plays during one down. All action prior to a loose-ball play are part of the loose-ball play and may or may not be followed by one or more running plays.
For example, on a legal forward pass play, you have a loose-ball play scenario wherein everything that happens prior to the ball being released by the passer retroactively becomes part of the loose-ball play and the loose-ball play status does not end until the receiver or defense catches the ball; at which time a running play ensues. Any fouls by B during the loose-ball play would have previous spot enforcement (except roughing the passer which could have succeeding spot if the ball is caught and advanced beyond the LOS by A), and fouls by A would have basic spot enforcement with the previous spot being the basic spot, but also following all-but-one. Add in PSK enforcement for the scrimmage kick scenarios and you will have this mastered in no time. Good luck.

Thanks! I spent a couple of evenings this past week on this subject and I think I have it down pretty good now. Now it is a matter of seeing it on the field.