I reviewed all of the starting offensive tackles two weeks ago. This is the review for centers and guards. My threshold to be classified as a starter is 400 total snaps. There were 35 centers who played 400 or more offensive snaps in 2023 and 69 guards. There is little free data available on the play of offensive linemen, but SISdatahub.com is one of the few. PFF shows the overall grade for each player in front of their paywall, but the rest of the data that they have is behind their paywall (and I don’t have a subscription because their cost for “media” members is crazy expensive).
Data-driven ranking of all starting NFL interior offensive linemen in 2023
