It was another bad season for the Vikings offensive line. Kirk Cousins was the 2nd most pressured quarterback in the NFL according to Pro Football Focus, largely due to the Vikings offensive line being ranked 29th in pass blocking efficiency. If you look at overall team run and pass blocking rankings, which include non-OL blockers as well, the Vikings ranked 25th and 27th respectively. Overall, PFF ranked the Vikings offensive line 29th in the NFL this season.
In terms of individual starters along the offensive line, only Riley Reiff was graded above 70 - which is meant to be average - overall.