No. 23 Arizona's Tate proving to be unstoppable

Tucson, Ariz. • Khalil Tate kept the ball on a zone read and raced around Colorado's defensive end, quickly widening the gap with each cheetah-like stride.A defensive back had the angle on Arizona's quarterback around the 10-yard line, but Tate broke through his arm tackle, cut at almost a right angle to avoid another tackler and left a final one futilely diving at his feet as he crossed into the end zone.Tate has kept running from there, leaving defensive players scattered behind him as he