No, whether in Basketball or Football, a player may not step out of bounds and receive the ball. However, once another player touches the ball, other than the one currently holding the ball, that player may receive the ball.
Well if the professional football player has the ball then no cuz if you go out of bounds then you go out of bounds so.
If he is on defense.
If the player with the ball steps out of bounds, the play is over. If another player steps out of bounds, he cannot rejoin that play unless he was forced out by an opponent.
No, not unless: a) you were forced out of bounds by a defender and immediately came back onto the playing field, or b) someone else touches the ball first. Otherwise, you would be assessed a penalty for illegal touching, which is a loss of down -- same as if the pass were incomplete.
yes the defensive player can run out of bounds and come back in and tackle a player. the reason is because the defensive player doest have the ball so it would not be illeagle.
run or jump catch or pass
All players can be out of bounds if they wish, but it will not get them anywhere.
Yes. The technical way to score a touchdown is to have to ball "cross the plane" into the endzone without the player being down or out of bounds. With a catch, the player must establish himself as inbounds while maintaining possession. In the NFL, the player must do so with two feet inbounds. In NCAA Division I football, the player only needs to do so with one foot inbounds. With a run, the player must have not stepped out of bounds before the ball crosses the plane into he endzone.