The Texas Longhorns were one of the most volatile teams in the country last season, and nearly snuck their way into the College Football Playoff after failing to live up to expectations early on in the year. Looking to right those wrongs from the season before, head coach Steve Sarkisian has completely revamped his roster, and is looking to bring a national championship back to the Forty Acres for the first time in over 20 seasons. A four-game stretch, though, from September 26 through October 24, could be their toughest stretch of the year, and answer a lot of questions about how good the Longhorns are halfway through the year. How A Four Game Stretch Could Define A Season Texas Longhorns quarterback Arch Manning (16) runs with the ball against the Michigan Wolverines during the first half at Camping World Stadium. | Matt Pendleton-Imagn Images For the Longhorns, early struggles during the season were the talk of college football, and how a slow start could bite them.…