Ratings don't matter nearly as much as they should, because this game isn't built upon physics, but upon animations (which is the worst way to make this kind of game, by the way). That's why 5'5 cornerbacks can jump high enough to knock the ball out of a 7 foot receivers hands. Even though that would never actually happen. Ratings/height/weight don't matter nearly as much as they should. And ratings barely matter as it is.