LAS VEGAS (AP) — With the notable exception of Friday night's Alabama-Oklahoma showdown, bettors aren't exactly rushing to place wagers on the opening week of this season's College Football Playoff. The presence of two Group of Five representatives — 11th-seeded Tulane and 12th-seed James Madison — in matchups in which they are considerable underdogs has taken a lot of the luster off the first round. Sixth-seeded Mississippi is favored by 17 1/2 points at BetMGM Sportsbook over Tulane, and No.