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Some football players from Georgia, Georgia Tech and Northwestern had the letters APU — All Players United — written on their gear during Saturday’s games as a show of solidarity that organizers hope will lead to changes in the NCAA. National College Players Association, an advocacy group for college athletes, is pushing for better health care of athletes, more scholarship money, and to lift NCAA restrictions on players’ ability to directly benefit from commercial opportunities. Georgia Tech quarterback Vlad Lee had APU written on his wrist tape, as did Northwestern quarterback Kain Colter in the Wildcats game against Maine.