Sometimes breaking the rules is fun. That's exactly what Pro Football Focus did Wednesday when they ranked the best edge-rushing duos in the NFL.
The 49ers top the list, but there's a catch. When it comes to the defending NFC champions, they actually sport a trio of star edge defenders in Nick Bosa, Dee Ford and Arik Armstead.
Nick Bosa already is the 41st-best player in the entire NFL on PFF's rankings. He recorded 13 sacks, 30 QB hits and 19 tackles for loss in 19 games last season as a rookie, including the playoffs.