Dump-Off: If this player would become the ball carrier or drop the ball, you may move the ball to a friendly player at this matchup.
Can I move tha ball to a friendly downed player? There is no info in the "Player states"'s downed column.
Yes. Nothing prevents a downed player from getting the ball. The only time a ball is affected by a downed player is the moment he is being downed or injured and loses the ball at that point.