With a rookie quarterback and one of the NFL's best defenses, the Denver Broncos were content to play conservatively at Jacksonville.
It was the perfect formula against the self-destructing Jaguars.
Bradley Roby returned an interception 51 yards for a touchdown, and the defending Super Bowl champions beat the mistake-prone Jaguars 20-10 on Sunday and gained ground in the AFC playoff picture.
Roby picked off Blake Bortles' wobbler across the middle in the third quarter — star linebacker Von Miller hit Bortles as he released the ball — and went untouched the other way. It was one of three turnovers for Denver's defense.