@mellis23I think it has nothing to do with Ball Overload. I think it has to do with some players on purpuse influence their connection (The Lag).

And also my opinion is that players who have no to nothing stamina left, get a too low speed reduction. As yeah, is something that surprise me too, that a 80 Pace rated player with no stamina runs faster then a 90 pace player with half stamina left (both without ball).