No, a timeout can not be called until the player with the ball is down or out of bounds.
You tackle the ball, not a player.
No. In Professional Football, in order to be "down" a receiver has to be tackled or in your scenario touched by a defensive player while on the ground.
any player on the offensive team
Receives the ball from the center, and either runs with it or passes it to another player. And they get tackled. A lot.
I would imagine this is (offensive coordinator) A coach Not a player
In the game of American football, an offensive lineman is a player who is primarily responsible for blocking.
It's when an offensive player blocks and knocks over a defender.
No, the offensive line can't catch a pass
Either the referees will call a dead ball or the defender tackles him on the field. Sometimes it's pretty rough when a guy gets tackled.