After chalk ruled the country in Week 8, Week 9 was a bit less predictable. Three top-25 teams fell to unranked opponents, Ohio State clawed back to beat Penn State and Iowa State shocked another top-five foe in TCU.
Beyond the Cyclones' massive upset -- leaving the conference wide open at the top -- Big 12 action featured another big day from Baker Mayfield, a barn burner in the rain in Morgantown and a big-play-filled game between in-state rivals in Lawrence.
Help us recap the best of Week 9 in the conference:
Week 10 gets underway on Halloween night with a pair of Ohio-based rivalries: Bowling Green vs. Kent State (8 p.m. ET on ESPNU/ESPN App) and Miami (OH) vs. Ohio (8 p.m. ET on ESPN2/ESPN App).