Lincoln Riley just made the biggest call of his two seasons as Oklahoma head coach.
His decision to hire Alex Grinch as Oklahoma's defensive coordinator carries major implications. If you want to know why so much rides on Riley's decision, remember that with an even average defense, OU might have been playing for a national title the past couple of seasons. The Athletic was the first to report the news Friday.
As a bonus, the choice of Grinch immediately created all kinds of Suess-ian references and puns on the Internet. Your defense had better be a mean one, Mr.