Adam84
Rod McCall (65)
With the obvious exception of the tacklers charged with lying on top of the ball carrier to allow defence lines to be set.
I think that's a metric as well, they use it to measure how disruptive a player is or effective at slowing the ball down.
Looking at the NRL website they have in game statistics for all players with their average play-the-ball speed. It's a simpler game where they can quantify these statistics much easier then rugby. But you also listen to some famous coaches and they don't like stats, statistics can be manipulated to tell whatever story you like.