We may look back on the second week of the college football season as Reassessment Saturday.Several favorites to win or strongly contend for division championships stumbled to unranked opponents, some in mind-boggling fashion. Arkansas, Wisconsin, Nebraska and Oklahoma State may have changed the course of their seasons, at least the impression of best-case scenarios, with stunning losses.Start with the Razorbacks.Or end the John L. Smith era at Arkansas, some fans are saying.The Razorbacks were given a shot to win the SEC West because top contenders Alabama and LSU visit Arkansas this season.But so did 30-point underdog Louisiana-Monroe, and the Warhawks left 34-31 overtime winners.Hogs quarterback Tyler Wilson missed the second half after taking a blow to the head, but Smith said chances are good Wilson will play against the Crimson Tide this week.Smith needs all the good news he can get. He was pounded by fan message-board critics afterward, many calling for the return of Bobby Petrino, whose offseason motorcycle crash and his cover-up of an improper relationship is why Smith is coaching on an interim basis this season.Petrino isnt returning, and Arkansas and Smith have an opportunity to change the topic: Beat Alabama this weekend.Thats probably not going to happen, and after Saturday neither is Smith remaining as coach beyond the interim.Big Ten division races may turn away from Wisconsin and Nebraska because both were betrayed by traditional strengths.The power-running Badgers couldnt move the ball at Oregon State in a 10-7 loss. Montee Ball, the top returning player in terms of Heisman voting, finished with 61 yards and didnt score a touchdown for the first time in 22 games.Throw in lost yards on sacks, and one of the nations top grind-it-out teams finished with 35 rushing yards in 23 attempts. An opportunity for Wisconsins offense to get healthy comes later this month when it visits Nebraska. In a defensive effort reminiscent of the dreadful end of the Bill Callahan-era, the Cornhuskers surrendered a whopping 653 total yards in a 36-30 loss to UCLA.The margin was that close only because the Bruins didnt capitalize on all of their scoring opportunities, and there were plenty. Nebraskas front seven put up little resistance as UCLA gashed its way to 344 rushing yards.This from a program headed by Bo Pelini, a defensive specialist who restored the Blackshirts pride upon his arrival in 2008. But the defensive numbers slipped last season and could nose-dive this year.Defense figured to be Oklahoma States strength this season after the Cowboys climbed in the national rankings over the last few years on the power of dizzying offense and skill position stars. With the Cowboys breaking in freshman quarterback Wes Lunt, a defense returning most of its starters was called upon to carry a greater share of the load.Instead, Arizona unloaded on Oklahoma State 59-38 in the desert in an effort Cowboys coach Mike Gundy called undisciplined, out of control.The Cowboys set a school record with 167 penalty yards, and all 15 flags were of the major variety. It was natural to wonder whether Oklahoma State got anything from its glorified scrimmage the previous week, an 84-0 walkover of Savannah State. The Cowboys hardly broke a sweat and, with the number of mistakes against the Wildcats, hardly seemed ready to step up in competition.Reassessing is happening elsewhere. Missouri didnt expect to get steamrolled in the fourth quarter at home in a 21-point loss to Georgia. Iowas offense remains missing after falling at home to Iowa State 9-6. Auburn knew it would have to be at the top of its game to extend a four-game winning streak over Mississippi State, but the Tigers didnt score an offensive touchdown in a 28-10 loss to the Bulldogs.But the disappointment is stronger elsewhere. Nobody is out of its division or league race, but what appeared in the preseason to be promising marches now seem like uphill climbs.