On this week's episode of SCHOOLED, John Clayton teaches a class on the trends and concerns in NFL injuries with ESPN's injury analyst Stephania Bell Tony Romo is already out 6-10 weeks with a spinal fracture he suffered on his first series of the third pre-season game. Teddy Bridgewater may be out 9-12 months after dislocating his knee. ACL tears are up. What's going on? Should the NFL shorten the pre-season? How can teams manage the salary cap hit carrying so many injured players? How has the pre-season injury toll already affected the post-season picture? The Professor and Stephania Bell have the answers.