Intentional

[Dave9819]

If the defender contacts the player in bounding the ball, per 4-19-3(e) and 9-2-10 penalty 4, it is an intentional foul.

"The opponent(s) of the thrower shall not have any part of his/her person through the inbounds side of the throw-in boundary-line plane until the ball has been released on a throw-in pass."

Penalty: If an opponents(s) contacts the thrower, an intential personal foul shall be charged to the offender. No warning for delay required.