By any spreadsheet, nerd’s algorithm or Fat Joey’s Calzone and Sportsbook, the No. 5 Oregon Ducks‘ College Football Playoff opener looks like a formality dressed up as a national event. The Ducks open Saturday against No. 12 James Madison at Autzen Stadium as 21-point favorites — a primetime belt-to-buns hardly worth pundits’ coveted analysis. Oregon enters its inaugural home playoff …