College football tracker: Kansas State stuns Oklahoma, Texas Tech upsets Texas

It's Week 4 in college football, which means conference play began for most teams throughout the country. The familiarity between league teams usually breeds close games and upsets and we've seen some of both on Saturday.

The biggest upset of the day was delivered by Kansas State, which shocked No. 6 Oklahoma 41-34 in Norman thanks to a massive day by quarterback Adrian Martinez.

Earlier in the day, Texas fell to Texas Tech on the road in an overtime stunner after star running back Bijan Robinson fumbled on the Longhorns' first play of the extra period. The Red Raiders seized the opportunity, kicking a field goal to beat their in-state rivals a few plays later.

In SEC play, No. 23 Texas A&M picked up a key win over No. 10 Arkansas, which lost in painful fashion as a potential go-ahead field goal attempt bounced off the top of the upright in the closing minutes.

Oregon, Texas A&M, Tennessee, Clemson and Michigan all eked out wins over conference foes elsewhere.

In non-conference action, Miami suffered what will likely end up being the most embarrassing loss of the day in getting throttled at home by Middle Tennessee.

What's happened so far: