Oklahoma’s reign as the best team in the nation lasted only one week as the top-ranked Sooners fell at home to Big 12 rival Texas 45-35 on Saturday. Below are six quick-hit observations from the game.

1. Colt McCoy has become more than a fantastic player. The Longhorns’ junior QB has been one of the more talked about players in college football since his freshman year. But it was evident in UT’s win over OU that McCoy has become much more than that – he’s also become a leader for Mack Brown. Despite being down 11 on two separate occasions in the first half and playing through four lead changes, McCoy never panicked. He also didn’t make a mistake and while fellow candidate Sam Bradford had flashier numbers, McCoy proved why he should be the front-runner for the Heisman this year. McCoy certainly benefited from Chris Ogbonnaya’s (15 carries, 127 yards) as well, who had one of most pivotal plays of the game when he broke a 62-yard run to set up a touchdown late in the fourth quarter.

2. While it was in a losing effort, Sam Bradford’s performance was phenomenal. It’s easy to forget that he’s only a sophomore with how mature he has looked this year. And while he did throw two interceptions (one was on the last play of the game on a desperation pass), his performance isn’t why OU won’t find themselves at the top of the rankings when the new polls are released.

3. Where was the defense? For being the No. 1 ranked team in the nation, Oklahoma’s defense just wasn’t that good to begin with and it showed today. The Horns racked up 45 points and 438 yards of offense sure, but the bottom line is that the Sooners’ defense couldn’t come up with the big play when it mattered most. And they allowed UT wideouts to roam free too many times in the secondary.

4. What was the game plan again? Speaking of OU’s defense, coordinator Brent Venables continues to make zero adjustments when his unit is being scorched. The amount of openings that McCoy and the Longhorns had offensively couldn’t have only been because the Sooner defenders were missing assignments. OU’s overall defensive game plan was weak from the start.

5. The officiating in his game was brutal. Blown calls were the norm and there were two plays that were inexcusably not reviewed. At least it was bad on both sides.

6. The Big 12 is still up for grabs. Looking ahead, Texas certainly isn’t in the clear yet to win the Big 12. The Longhorns host No. 3 Missouri and No. 17 Oklahoma State the next two weeks, then are at No. 7 Texas Tech and No. 16 Kansas in November. OU hosts Kansas next week, but doesn’t have to face Missouri and gets Texas Tech at home before facing in-state rival Oklahoma State to wrap up the season.