Defensive Holding or Not?

[mikesears]

1. At the snap, defensive lineman B1 grabs offensive lineman A1 by the jersey and moves him to the side and tackles ball carrier A2 for a loss.

2. At the snap, defensive lineman B1 stands, reads the play, and sees that ball carrier A1 is moving in his direction. He grabs blocker A1 by the outside of the shoulder pads and pushes him out of the way and tackles A1 for a short loss.

3. A the snap, defensive lineman B1 grabs offensive lineman A1 by the jersey and flings him to the ground. B1 thens tackles the ball carrier for a short loss.