which does not translate into football. When a runningback gets a bunch of carries, he will likely have multiple short gains of less than 3 yards. Thats part of grinding it out on the ground. You pound away with short gains until eventually the defense gets worn down and the RB busts a long one. But 2 or 3 yard gains are much more common than a 40 yard gain, so removing the longest gain and the shortest gain is going to pull the ypc total downward in almost every case.