CRP rules wrote:Pass Block (General)
A player with this skill is allowed to move up to three squares when the opposing coach announces that one of his players is going to pass the ball (but not a bomb). The opposing coach may not change his mind about passing once Pass Block's use is declared. The move is made out of sequence, after the range has been measured, but before any interception attempts have been made. A player may not make the move unless able to reach a legal destination and may not follow a route that would not allow them to reach a legal destination. A legal destination puts the player in a position to attempt an interception, an empty square that is the target of the pass, or with his tackle zone on the thrower or catcher. The player may not stop moving until he has reached a legal destination, has been held fast by Tentacles or has been Knocked Down. The special move is free, and in no way affects the player’s ability to move in a subsequent Action. The move is made using all of the normal rules and skills (for example, having to dodge in order to leave opposing players’ tackle zones.) Players with Pass Block may use this skill against a Dump Off pass. If a player performing a Pass Block in their own turn is Knocked Down then this is a turnover, no other players may perform Pass Block moves, and your turn ends as soon as the results of the pass and the block are resolved.
So much for the original rulebook text.
Yes, you may use any skill, including Leap, to get to that legal position. Since Leap takes two squares, you'll only have one square to move before or after leaping.
As it says "Players with Pass Block may use this skill against a DumpOff pass. If a player performing a Pass Block in their own turn..." I think, yes, you may Pass Block during your own turn.
The last question is not so easily answered as the description to Leap clearly states that it can only be used once per turn. I personally would say yes, you can use the Leap skill while pass blocking and then use it again in the players "real" turn, just because of the "special move" phrase. The special move is not that players turn.
If your opponent dumps-off the ball, you may leap to an intercept position, intercept the ball, and then leap again to get away with it, at least as far as i understand it.
If I got this right, the last few sentences state that only if you pass block in your own turn and end up with a turnover, no other players may perform pass block moves. This should mean that, yes, while everyone is still standing, you may get more than one pass blocker on his way. But still, you can only try one interception.
This is mostly just my opinion and understanding of the text. It's free for discussion.