Last season, the Los Angeles Rams fielded one of the worst offensive lines in football. It was one of the main reasons Jared Goff struggled mightily in his seven starts, being sacked 26 times in that span.

The front office made a concerted effort to rebuild the offensive line in the offseason, bringing in Andrew Whitworth and veteran center John Sullivan. Both players have met expectations (and probably exceeded them) with Whitworth proving to be one of the best left tackles in the NFL at the age of 35.

Goff has been sacked just six times all year – fewer than 28 other quarterbacks in the NFL – which goes to show just how much the Rams’ line has improved. And according to Pro Football Focus, Los Angeles’ offensive line has been the 12th best in the league this season with an average grade of 69.1.

The Rams offensive line could probably get an award for most improved unit in the NFL. That has a lot to do with the free agent acquisition of veteran left tackle Andrew Whitworth. The former Cincinnati Bengal is the highest-graded player on the line with a grade of 84.4, fifth among offensive tackles in the league. While Whitworth gave up four total pressures, including a sack, against Seattle in Week 5, he allowed just one total pressure in the first four games. As a comparison, Greg Robinson – who played left tackle for the Rams last season – gave up four pressures in just the first game of the 2016 campaign.

Whitworth had his worst game of the season on Sunday against the Seahawks, which is understandable, allowing one sack and a handful of quarterback pressures. The sack he allowed was a crucial one, resulting in a strip sack and a fumble lost by Goff. Still, he’s only allowed five quarterback pressures all season.

The right side of the line has been a pleasant surprise, too, with Rodger Saffold holding his own at guard and Rob Havenstein doing a good job of protecting Goff against guys like DeMarcus Lawrence and Michael Bennett.