Establish back in bounds... Please Help

[Chairman7w]

Hi Guys, a situation came up and I'm a little fuzzy on the whole "must establish himself in bounds before touching a live ball" rule.

- Player A is dribbling up court on left side of court.

- Opponent B approaches (right side of court to him), and tips ball away into the backcourt.

- Opponent B's momentum carries him out of bounds as he continues towards ball.

- Opponent B *clearly* establishes himself back in bounds while pursuing ball.

- Opponent B picks up ball.

Is it legal? (my confusion comes in cause no one else touched the ball)


Thanks in advance.