[waltjp]

Correct, this is not a loose ball play.

2-33

ART. 1 . . . A loose-ball play is action during:
a. A free kick or scrimmage kick other than post-scrimmage kick fouls.
b. A legal forward pass.
c. A backward pass (including the snap), an illegal kick or fumble made by A from in or behind the neutral zone prior to a change of team possession.
d. The run or runs which precedes such legal or illegal kick, legal forward
pass, backward pass or fumble.

ART. 2 . . . A running play is any action not included in Article 1.

The basic spot is the end of the related run, B's 24, where A88 fumbled. The foul was committed by B before B secured possession of the ball. Because B did not gain possession with 'clean hands' they are not keeping the ball. The penalty will be enforced from B's 24. The result will be 1/10 for A from B's 19, or B's 12 if the facemask was a 15-yarder.