We have reached the midway point of an unprecedented college football season, with conference realignment and the expanded playoff heaping storylines onto a sport already oozing intrigue. With seven weeks down and seven remaining, the Big 12 race is inside-out, upside-down and deliciously insane. The favorites are struggling, the pretenders are thriving and mayhem reigns supreme. Here’s a review of the first half. Top storyline: Chaos everywhere The three teams tied for first place with 3-0 conference records were picked sixth (Iowa State), ninth (Texas Tech) and 13th (Brigham Young) in the Big 12 preseason poll.