Too many times Texas coach Mack Brown has been in full-blown apology mode after playing Bob Stoops and the Oklahoma Sooners at the Cotton Bowl. It happened again this past Saturday after Brown’s Longhorns were embarrassed by the Sooners and Bob Stoops, this time 63-21. It’s the type of blowout loss that’s eerily too familiar to Longhorn nation.Before we throw a big pile of Bevo expenditure on Coach Brown lets underscore that his record at Texas stands for itself. Brown is 145-41 at Texas, with nine seasons of at least 10 wins (something Texas achieved just twice in the 14 years before his arrival). The Longhorns won the 2005 National Championship and it could be argued they were a Colt McCoy injury away from winning it again in 2009.Since that loss to Alabama in the 2009 title game Brown, and the Longhorns are a very un-Texas like 17 and 14. More discriminate is that Brown has done nothing against Bob Stoops and Oklahoma, losing all three games since 2009 by an average score of 48 to 19. Don’t think this is just a antiquated trend because Brown has beaten Oklahoma only six times in 15 tries. Against Stoops, who arrived in Norman a year later than Brown did in Austin, Brown is 5-9.Mack Brown has been around long enough to know the importance of the rivalry between Texas and Oklahoma. Though it’s becoming more difficult to call it a rivalry because that assumes both teams are winning.. As an assistant to Barry Switzer in the mid-1980s, he asked Switzer: “What do you have to do to keep your job here, and what do you have to do to keep everybody happy?” As recounted by Brown, Switzer’s reply was brief: “You’ve got to beat Texas.” Switzer surely passed along that little nugget of info to Bob Stoops who apparently took him at his word.For as stable as Mack Brown appears to be at Texas he won’t last much longer if he doesn’t turn the fortunes of the Longhorns against the Sooners. Texas fans can tolerate losing to Texas Tech or even Baylor once and awhile but Orangebloods do not appreciate the bitter taste of State Fair Corny Dogs with Oklahoma mustard on top.It would perhaps be different if OU simply had a huge advantage in talent. Texas and Oklahoma have both consistently produced Top 10 national recruiting classes. Check out how much talent both schools are moving on to the NFL and you find Oklahoma currently has a respectable 24 players on NFL rosters. Texas has a whopping 41. That means one of two things is happening to give OU the advantage in this series. Either the Texas recruits have been overrated or the Oklahoma coaching staff has been “coaching up” their talent better than Mack and the Texas staff. The NFL numbers lead me to wonder about coaching. Mack Brown has always been known as a great recruiter, as is Bob Stoops. Both men lean extensively on coordinators for the “x’s and o’s” of the game.The Texas team I saw Saturday was not ready to play and that falls to the head coach. It’s his job to make sure that all the strategy and game planning makes sense and is understood by all players. Most imperative for a head coach is that he has his team mentally sharpened to a razors edge. It’s eminence that can’t be understated when trying to gain the advantage in competition. As has been the case in too many previous meetings with Oklahoma, it was the Sooners who showed keenness and awareness. Texas was mistake prone and slow to react, on the field, on the sidelines, and upstairs in the coaches booth.That’s on Mack Brown and I’m sure he is perfectly willing to take the heat for it all. He has always been an honest guy, not afraid to divulge his demerits. That’s good because he should deservedly get a lot of criticism for what happened Saturday.Brown has a 3.5 million dollar buy out at Texas and with his record, and the money he has made the University, it’s not likely he’s going anywhere soon. I used to think that meant he was free to retire at his own choosing and join Darrell Royal as the greatest coach in Texas history. But if he’s not careful he’ll tarnish that future.Brown is still on solid ground but it’s not as concrete as it once was and it could fall in on him is he doesn’t find a way to beat Oklahoma in 2013.