The Spreadsheet Fallacy: Why Caleb Williams Defies the Data

In the modern NFL, there is a relentless drive to reduce the chaos of the gridiron to a series of clean digits. The latest attempt comes from Austin Mock, an NFL data analyst for The Athletic, who introduced the QB Index (QBI). As Sports Illustrated first reported, Mock's goal is for the QBI to serve as the gold standard for quarterback evaluation, but his debut stock report for the 2025 season reveals the inherent flaw in trying to quantify a generational talent like Caleb Williams.

According to reporting from Sports Illustrated, Mock's QBI placed Williams at QB23 with a score of 99, where 100 represents an average quarterback. To put that in perspective, the model ranked career journeyman Marcus Mariota at QB14 and five-time Pro Bowler Jared Goff at QB22. In the eyes of the calculator, Williams is roughly on par with Baker Mayfield and Kirk Cousins.

Mock did not shy away from the discrepancy, devoting four paragraphs to explain the low ranking. He noted that Williams ranked 21st among qualified quarterbacks in dropback success rate last year. While the QBI credited Williams for avoiding negative plays by limiting sacks and interceptions, Mock reported that the model disliked Williams' inefficiency despite having pristine protection. Essentially, the down-to-down efficiency simply wasn't there.

**OPINION:** Here is where the spreadsheet fails. The game is played on the grass, not in a lab, and the most critical component of Williams' game is the one thing a formula cannot track: the clutch factor.

As Sports Illustrated reports, Williams led an NFL record seven fourth-quarter comebacks last season. In an appearance on 'Hot Ones,' Williams himself noted that some things cannot be researched or put into a lab, suggesting that some players simply possess a 'clutch gene' while others do not. When you weigh the reality of those big-game moments against a ranking of QB23, you have to ask if there are actually 22 quarterbacks who performed better than Williams in 2025.

Furthermore, the QBI provides a static snapshot of a full season, which obscures the trajectory of a player's growth. Williams had a rocky start, including a particularly poor Week 7 performance against the Saints. However, it is undeniable that Williams' play improved significantly throughout the second half of the season. His momentum peaked in Week 17 during a near-comeback against the 49ers and carried into the playoffs, where he posted a 70.4 QBR in a Divisional round game against the Rams.

This arc mirrors Jordan Love's 2023 season, where Love struggled early before establishing himself as the Packers' franchise quarterback. Contrast that with 2024 draftee Drake Maye; while Maye was the regular season MVP runner-up, Sports Illustrated reports his four-game playoff run was historically bad, performing worse than Rex Grossman did in 2006.

Mock admitted his model isn't perfect, tongue-in-cheek calling it "A perfect QB stat everyone will love, and no one will disagree with." While the QBI has "good bones" by focusing on how a quarterback impacts a play, it remains a limited view. You cannot reduce Caleb Williams to a cell in a spreadsheet when his value is proven in the final two minutes of a game.