DENVER — At the end of the third quarter Saturday night, the Warriors appeared poised to overcome a raucous Pepsi Center crowd and — perhaps most importantly — physical and mental fatigue for another road win. But there Golden State was, playing matador defense in the final 12 minutes. A Nuggets team that could face the Warriors in the first round of the playoffs erupted for 38 fourth-quarter points to steal a 115-108 victory, its second win over Golden State this season. In that final period, Denver shot 10-for-21 from the field, including 4-for-8 from three-point range, as the Warriors only mustered 21 points.