This is what Creasy doesn't get enough credit for. They've obviously had a lot of talented players transfer in, but it takes a lot more than talented players to win a championship, let alone multiple championships at this level. The line of scrimmage is where Oakland usually has a significant advantage over every team they play. Creasy is a genius at using multiple formations, shifts, trades, etc to create mismatches & number advantages. He doesn't get enough credit for the feeder system he's put in place. What has been built there is a result of a lot more than just having some talented players transfer in.