After topping Tullahoma for a season-opening win Monday, the Warren County High School Pioneers went on the road to defeat Cannon County, 83-76, in an overtime barn burner Tuesday.Pioneer Isaiah Grayson scored a game-high 26 points. Tied at 36-36 at the half, it was a footrace to the finish. Warren County (2-0) was helped by Chance Hobbs, who hit three 3-point shots of the Pioneer’s four long-range conversions, scoring 20 points.