Ranking the top 10 offensive lines in the NFL going into 2020

Ranking the top 10 offensive lines in the NFL going into 2020

6. San Francisco 49ers

(Photo by Abbie Parr/Getty Images)

The Niners already had one of the best offensive lines in football. They averaged the second-most rushing yards per game (144.1) and had the eighth-lowest adjusted sack rate (6%). Now, they’ve gone and added the best left tackle in the sport by trading for Trent Williams, a seven-time Pro Bowler who should be fresh after sitting out the 2019 season. Getting an upgrade over the retiring Joe Staley is a steal.