Pro Football Focus: The Detroit Lions have the worst offensive line in the NFL

It was just over a month ago that Pro Football Focus ranked the top 10 offensive lines in the NFL before the season started. Feeding into an already ravenously-optimistic fanbase, PFF shockingly ranked the Detroit Lions ninth on the list.

A month later, PFF is singing a very different tune. Through four weeks of the 2015 season, the Lions now rank dead-last in PFF"s offensive line rankings. Here's what PFF had to say about the offensive line:

"There’s a real litany of problems with the Lions line this year. Rookie Laken Tomlinson has struggled when pressed into action, Larry Warford isn’t healthy, and the right tackle spot has proved nothing more than a turnstile to pass rushers looking to fill their pockets with sacks, hits, and hurries. They need to get better—quick."

At this point, I think it's unrealistic to expect anything to turn around quickly. Sure Tomlinson and Travis Swanson are expected to get better as continue to get acclimated to the NFL. But the Lions' biggest problem -- right tackle -- is a lost cause at this point. Whether it's LaAdrian Waddle or Cornelius Lucas, the Lions are putting a huge liability out there. Perhaps with Brandon Pettigrew likely returning soon, the Lions will be able send help to the right side of the line, but I wouldn't expect a huge turnaround anytime soon.

This week, the Lions send out the worst offensive line to face the Arizona Cardinals, who -- according to Football Outsiders -- rank as the third-best defense in the league. Good luck.