Houston Texans second-year quarterback C.J. Stroud didn’t play in Week 14, meaning his Total QBR rating of 53.0 remained intact among all 32 passers. Stroud’s season-long rating remains in good standing entering the final four games of the regular season, but he still ranks among the bottom half of passers at No. 22 overall.

Denver Broncos rookie quarterback Bo Nix posted a Total QBR rating of 41.4 in the team’s 41-32 win over the Cleveland Browns last week, bringing his season-long Total QBR average to 55.5. That’s a slight decrease from last week’s rating (55.9), but Nix’s rank among starting QBs (No. 18) has actually improved since last week (No. 21).

Which quarterbacks have put on the best single-season performances ever? FOX Sports Research breaks down the top 10.