Amphs will keep you awake, but they're not performance enhancers.
I don’t pretend to know much about amphetamines, or steroids for that matter, so there might be a perfectly sane reason for me being wrong on this, but I’ll ask anyway.
If amphetamines help to keep me awake or give me energy, doesn’t that put me in a better position to play a day game after a night game or maybe the 11th straight game in the middle of August or even to play after a cross-country flight in the middle of the night?