It's super awkward to speak highly of a St. Louis Rams offense that finished dead last in Adjusted Passing NEP per play. It was ugly and abominable, but it doesn't look like you can blame the offensive line for it.
As bad as Nick Foles was, he still managed to finish ninth in Sack NEP per drop back. This put him two spots behind the player who supplanted him in the starting lineup in Case Keenum. Two of the nine best Sack NEP per drop back marks came from Rams quarterbacks. That's a hefty endorsement of the boys up front.
If we just look at raw sack rate, things get even better for the Rams. Here, Keenum finished second with Foles in fifth place. With this being the case, it's hard to pin the offense's inefficiencies on the offensive line. They appear to have done their job exceptionally well.
So if Foles wasn't losing efficiency because of his offensive line, how bad was he with his arm? This is not a question that the faint of heart should be asking. The numbers are NSFW.
Overall, Foles finished 43rd in Passing NEP per drop back out of 46 quarterbacks with at least 100 drop backs at -0.17. When we take out the NEP lost on sacks, Foles improves to -0.09. This makes him the worst quarterback in the league, trailing second-worst Zach Mettenberger by a considerable margin. Not great, Bob!.
What does this mean moving forward? The Rams have some decent pieces in place offensively. Todd Gurley seems like a quality running back, and the offensive line is clicking along well. It's just unfortunate that the play of their quarterback has lowered the reputation of a unit that is truly set up for long-term success.