Via K-State Athletics LAWRENCE, Kan. – Kansas State fans chanted, "FIFTEEN YEARS!" and senior long-snapper Randen Plattner directed the marching band in the stands and coaches and players pumped their fists in elation as Memorial Stadium in Lawrence gained a purple hue. Again. No. 21 K-State 31, No. 25 Kansas 27. In what was billed as the biggest…