DB does have to play the ball. Especially if they are going to make contact early. They call PI all the time when the DB is actually playing the ball.
A player who has gained position shall not be considered to have impeded or restricted the opponent in a prohibited manner if all such actions are a bona fide effort to go to and play the ball.
Willie sliding through B gap like he doesn't want to get touched.
Some of these guys need to quit while they are ahead before we have to watch this pathetic ****.