Jan 5, 2025; Foxborough, Massachusetts, USA; Buffalo Bills quarterback Josh Allen (17) watches from the sideline as they take on the New England Patriots at Gillette Stadium. Mandatory Credit: David Butler II-Imagn Images

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Josh Allen reveals how a biometric specialist help him fix his throwing motion

Josh Allen’s accuracy leap: science meets grit in NFL history

Josh Allen wasn’t supposed to work. Not according to most scouts, analysts, and even Bills fans who doubted the Wyoming QB. He was raw, inaccurate, and leaned too heavily on his arm strength. The numbers backed it up—52.8% completion rate as a rookie is not what you want from a first-round pick. Yet, here we are. Seven seasons in, Allen’s name is constantly thrown into MVP conversations, and his team is a perennial Super Bowl contender. So, how did a “project QB” silence every critic? A biometric specialist and a willingness to rewrite his mechanics entirely.

Josh Allen knew he wasn’t good enough and decided to fix it

Josh Allen didn’t sugarcoat his flaws. “I know I’ve got a lot of flaws as a quarterback. The accuracy, of course. Being able to put the ball where it needs to be put at any given time.” That kind of self-awareness is rare, but it’s also why Allen has made one of the most shocking turnarounds in NFL history.

FASCINATING: A #NFL FILMS SPECIAL MASTERCLASS.#Bills quarterback Josh Allen fixed his rookie year accuracy problems with a biometric specialist and through countless reps.

Allen has turned into the #NFL MVP and the best quarterback in the league.

🤯
pic.twitter.com/LW2TFc85Pk
— MLFootball (@_MLFootball) January 9, 2025

In his rookie year, Allen’s completion rate sat at an unimpressive 52.8%. For comparison? That’s borderline unplayable for a starting quarterback in the NFL. By 2020, he wasn’t just fixing problems; he was setting records, with a 69.2% completion rate—an improvement of 17 percentage points, the highest in league history over two seasons.

How did he do it? A lot of reps, relentless self-criticism, and one person who completely changed how he approached the game.

Chris Hess rewired Josh Allen’s mechanics and maybe saved his career

Chris Hess isn’t a household name, but he’s the reason Josh Allen throws the way he does today. Hess, founder of Biometrek, uses biomechanics to analyze how athletes move and fix what’s broken. Allen didn’t just work with Hess—he trusted him to rebuild everything.

A biometric specialist, and a whole lot of reps 💪

A deep dive on how @JoshAllenQB reined in his rocket arm, fixing his rookie year accuracy issues 👀 pic.twitter.com/EL6wQmiRWl
— NFL Films (@NFLFilms) January 9, 2025

During Allen’s college days and his first two pro seasons, his throwing motion was all arm strength, all the time. And that wasn’t a flex—it was a problem. Over-relying on his arm led to shoulder pain, inconsistent throws, and a whole lot of “what ifs.” Hess introduced Allen to hip disassociation, a technique that shifts power from the arm to the lower body. Think of it as rewiring the way you move.

Allen called Hess “the most influential person in my mechanical career.” That’s not just a compliment—it’s an admission that without Hess, Allen might’ve been another draft bust.

Josh Allen’s rise to MVP status started with fixing his worst habit

When the Bills picked Allen seventh overall in 2018, the fans weren’t sold. Let’s be real—there’s footage of Bills Mafia collectively losing their minds (and not in a good way). The scouting reports weren’t kind either: strong arm, raw talent, accuracy issues, and struggles against top competition. Some even compared him to Kyle Boller. Harsh.

Zero Buffalo Bills have been voted as First Team AP All-Pro… pic.twitter.com/hF9sHnkZRZ
— Buffalo Bills (@BuffaloBills) January 10, 2025

The critiques weren’t wrong, though. In his rookie season, Allen’s accuracy issues were glaring. But post-2018, it was all about proving everyone wrong. Allen didn’t just improve; he became one of the best quarterbacks in the league. From being labeled “raw” to a legitimate MVP candidate, Allen’s journey is a masterclass in work ethic and adaptability.

Accuracy improvements that rewrote NFL history

Allen’s 17% accuracy improvement wasn’t luck or a fluke. After his rookie season, he worked with Hess to retool his mechanics. In an interview with Jason Garrett, Allen explained how his arm motion was the problem. “I was muscling throws, putting so much strain on my shoulder. It wasn’t sustainable.” Hess showed him a better way: use the legs, save the arm, and stop overcomplicating it.

The results? Immediate. By 2020, Allen was hitting a career-best 69.2% accuracy. That jump still stands as the largest improvement in NFL history. Hall of Fame quarterback Troy Aikman admitted he doubted if accuracy could be coached until Allen proved him wrong. “I’ve always believed accuracy is something you can’t coach. Josh Allen proved me wrong.”

Fans doubted him, scouts compared him to Kyle Boller, but Allen didn’t care

Bills fans weren’t thrilled when the team picked Allen seventh overall. Most scouting reports read like a list of red flags: poor accuracy, limited experience against top competition, and shaky performances in big games. WalterFootball even compared him to Kyle Boller—a name you do not want to be associated with in the NFL.

2023: "sure, Josh Allen has way better stats, but Lamar's team won more games"

2024: "sure, Josh Allen's team won more games, but Lamar has slightly better stats"

The MVP award lost all meaning years ago. Now it's just the, "Casual fans feel like this guy deserves to win more…
— Joe (@JoeA_NFL) January 10, 2025

Allen heard it all. And instead of crumbling under the pressure, he leaned into the criticism. “I know I’ve got a lot of flaws as a quarterback,” Allen said. “The accuracy, of course. Being able to put the ball where it needs to be put at any given time.” He owned his weaknesses and did something about them. That’s rare.

Image: Imagn

Josh Allen

Josh Allen biometric

Natasha Bose

I write about sports because, well, it brings in the big bucks! I’m not some lifelong analyst or stats guru, truth being told, you’ve probably never heard of me!—I just know how to research, write, and make things sound good. That’s the job!
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