Four Pac-12 teams will face ranked opponents on Saturday: No. 13 Wisconsin at Oregon State, 1 p.m., FX: OSU could have first-game gaffes after its season opener against Nicholls State was postponed due to Hurricane Isaac. Washington at No. 3 Louisiana State, 4 p.m., ESPN: Much-improved Washington defense looks like it could hold LSU under 50. No. 16 Nebraska at UCLA, 4:30 p.m., FOX: On paper, this is the Pac-12's best chance for an upset: Bruins are 4.5-point underdogs. No. 18 Oklahoma State at Arizona, 7:30 p.m., Pac-12 Networks: Rematch of OSU's 37-14 victory over the Wildcats last year.