0 Fatigue has never meant "sleeping". I've always interpreted it to mean "About as effective as Joe Blow on the street", because a 0 percent pitcher *can* make an out, just not very often, and the like. (Granted, I'm discussing baseball not football but I'd imagine the fatigue relevancy to be similar)
If Harris ran straight at Nielsen, I could see a tackle being made here. Harris himself is only at 58, so far from full speed himself. Not likely, perhaps, but the SIM in any sport is a game of probabilities.