PFF Stable Metrics
by Bo Marchionte
@bomarchionte | College2Pro.com
Published June 9, 2026, 6:41 AM
Zach Frazier: The Foundation Is Already in Place
It didn’t take long for Zach Frazier to prove the Steelers made the right decision.
The numbers are remarkably balanced. He’s an elite pass protector, consistently wins in obvious passing situations, and provides dependable movement in the run game. More importantly, there isn’t a glaring weakness in his profile.
Frazier’s Metrics Breakdown
- 88th percentile – Pass Block Grade
- 87th percentile – Pass Block Grade w/ No Play Action
- 87th percentile – Pass Block Grade on 5-, 7-Step Concepts
- 71st percentile – Run Block Grade on Gap Runs
- 69th percentile – Run Block Grade on Zone Runs
- 68th percentile – Positively Graded Run Block Percentage
- 65th percentile – Pass Block Grade on True Pass Sets
Frazier’s Outlook
The Steelers have spent years searching for stability in the middle of their offensive line. They may have finally found it.
Among Pittsburgh’s returning linemen, Frazier posted the strongest overall stable profile, finishing in the top tier of every major category without a single glaring deficiency. His combination of consistency, intelligence, and technique gives the Steelers more than just a starting center it gives them the foundation to build the rest of the offensive line around for years to come.
Mason McCormick: Quietly Becoming a Strength
If Zach Frazier is the headliner of Pittsburgh’s young interior offensive line, Mason McCormick is the player who may be getting overlooked. The second-year right guard took a significant leap in 2025, earning a 71.1 overall PFF grade while ranking among the league’s better pass-protecting guards.
PFF Metrics Explained
His stable metrics paint the picture of a player you can trust. McCormick consistently wins in true pass sets, holds up without the benefit of play-action, and shows the kind of reliability every quarterback appreciates. While his run-blocking still has room to grow, especially in gap concepts, his pass protection already looks like that of a long-term NFL starter.
For a Steelers offensive line built around youth, that’s exactly the trajectory Pittsburgh hoped to see from a fourth-round selection out of South Dakota State.
Stable Metrics Breakdown
- 80th percentile – Pass Block Grade
- 83rd percentile – Pass Block Grade on True Pass Sets
- 86th percentile – Pass Block Grade with No Play Action (Elite)
- 77th percentile – Pass Block Grade on 5- & 7-Step Drops
- 71st percentile – Run Block Grade on Zone Runs
- 56th percentile – Run Block Grade on Gap Runs
- 56th percentile – Positively Graded Run Block Percentage
McCormick’s Outlook
McCormick’s profile is easy to understand. He’s an excellent pass protector, improving run blocker. The Steelers don’t need him to be an All-Pro in year three. They need him to continue the steady climb he’s already shown.
If that happens, Pittsburgh could have one of the NFL’s youngest and most dependable interior offensive line combinations with Isaac Seumalo’s successor (signed with Arizona Cardinals) on one side, Zach Frazier in the middle, and Troy Fautanu anchoring the right edge. His development was one of the quiet success stories of the 2025 season.
Troy Fautanu: Stable Metrics Breakdown
The Steelers are counting on Troy Fautanu to anchor the offensive line for years to come, and his stable metrics reveal a player whose foundation is built on pass protection. While there is work to be done in the run game, the former first-round pick has already demonstrated the traits teams covet most in today’s NFL.
Fautanu’s Metrics Explained
Fautanu’s pass-blocking profile is encouraging. He grades above the NFL average in nearly every major pass-protection category, showing he can consistently hold up whether he’s protecting on true drop-backs or deeper passing concepts.
The biggest area for improvement is the run game. His 7th-percentile grade on gap runs stands out as the weakest part of his profile, while his zone-blocking production and overall run-block consistency also trail his pass protection.
Stable Metrics Breakdown
- 67th percentile – Pass Block Grade
- 58th percentile – Pass Block Grade on True Pass Sets
- 66th percentile – Pass Block Grade (No Play Action)
- 66th percentile – Pass Block Grade on 5- & 7-Step Drops
- 7th percentile – Run Block Grade on Gap Runs
- 41st percentile – Run Block Grade on Zone Runs
- 42nd percentile – Run Blocking Negatively Graded Plays
Fautanu’s Outlook
The encouraging news for Pittsburgh is that the hardest trait to find pass protection already appears to be one of Fautanu’s strengths. If offensive line coach James Campen can help elevate his run-blocking production, Fautanu has the tools to become the complete left tackle the Steelers envisioned when they made him a first-round selection.
Spencer Anderson: Versatility Is His Greatest Strength
Spencer Anderson may never light up the stat sheet, but he has carved out a valuable role in Pittsburgh because of one trait every coaching staff covets: versatility. A seventh-round pick in 2023, Anderson has played multiple positions along the offensive line and has become one of the Steelers’ most trusted reserves.
McCormick’s Metrics Explained
Finishing 54th among 81 qualified offensive guards according to PFF, identifies Anderson as what he is. A late-round developmental selection with grit. His 56.8 overall PFF grade shows plenty of improvement must continue to remain a contributing factor in Pittsburgh.
Anderson’s Metrics Breakdown
- 68th percentile – Pass Block Grade
- 79th percentile – Pass Block Grade w/ No Play Action
- 47th percentile – Run Block Grade on Zone Runs
- 30th percentile – Pass Block Grade on 5-, 7-Step Concepts
- 23rd percentile – Run Block Grade on Gap Runs
- 14th percentile – Pass Block Grade on True Pass Sets
- 7th percentile – Positively Graded Run Block Percentage
Anderson’s Outlook
Anderson’s metrics tell the story of a quality backup rather than an entrenched starter. His ability to play both guard spots and even tackle in a pinch is what keeps him valuable. Ourlads.com has Anderson penciled in as the starting right guard in Pittsburgh. That’s a risky move in my opinion. The arrival of rookie guard Gennings Dunker creates training camp depending on where they insert the rookie out of Iowa. Dunker behind McCormick on the left side or Dunker sliding in on the right side.
Broderick Jones: The Clock Is Ticking
No player on Pittsburgh’s offensive line enters training camp facing more questions than Broderick Jones.
The former first-round pick appeared to be finding his footing before a neck injury cut his season short. Now healthy, he returns to an offensive line that suddenly has options. Troy Fautanu is expected to assume a major role, Mason McCormick and Zach Frazier have established themselves as building blocks, Dylan Cook proved he belongs, and first-round rookie Max Iheanachor adds another talented body to the mix. The room has become crowded, and Jones no longer has the luxury of simply relying on draft status.
His stable metrics help explain why the evaluation remains unsettled. Outside of his natural athletic ability, there isn’t a category where he consistently separates himself. The flashes are there, but the week-to-week reliability that teams expect from a franchise tackle has yet to emerge.
Jones’ Metrics Breakdown
- 27th percentile – Pass Block Grade w/ No Play Action
- 24th percentile – Pass Block Grade
- 22nd percentile – Pass Block Grade on 5-, 7-Step Concepts
- 19th percentile – Run Block Grade on Zone Runs
- 13th percentile – Pass Block Grade on True Pass Sets
- 12th percentile – Negatively Graded Run Blocks (Higher is better in this metric, so this is a concern.)
- 6th percentile – Run Block Grade on Gap Runs
Jones’ Outlook
Talent has never been the question with Broderick Jones. Consistency has.
Training camp may be the most important stretch of his professional career. If Jones finally puts everything together, the Steelers could still reap the rewards of their first-round investment.
But if the stable metrics continue to mirror his on-field production, Pittsburgh has enough young talent along the offensive line that Jones could find himself fighting for more than a starting job.
If Pittsburgh feels the cupboards are full, he could be fighting for his future with the organization and traded away.
Max Iheanachor: First-Round Traits, Long-Term Ceiling
These stable metrics come from his college career, and they reflect a player whose best football is still ahead of him. His pass protection is solid across the board, while the run game remains the area with the most room for growth. That’s not uncommon for an athletic tackle still refining his technique after only a few years playing the sport.
Iheanachor Metrics Breakdown (College)
- 67th percentile – Pass Block Grade on 5-, 7-Step Concepts
- 59th percentile – Pass Block Grade on True Pass Sets
- 43rd percentile – Pass Block Grade
- 37th percentile – Run Block Grade on Zone Runs
- 32nd percentile – Pass Block Grade w/ No Play Action
- 22nd percentile – Negatively Graded Run Blocks (Lower is better in this metric, meaning fewer negative run-blocking reps.)
- 16th percentile – Run Block Grade on Gap Runs
Gennings Dunker: The Rookie Built the Iowa Way
These stable metrics are from his college career, so they should be viewed as a foundation rather than a prediction. The encouraging takeaway is that Dunker showed balance across most pass-protection categories while displaying above-average zone-blocking ability. Like most rookies transitioning from college to the NFL, consistency in the run game will be the biggest area to monitor.
Dunker’ Metrics Breakdown (College)
- 69th percentile – Run Block Grade on Zone Runs
- 67th percentile – Pass Block Grade
- 61st percentile – Pass Block Grade on True Pass Sets
- 59th percentile – Pass Block Grade on 5-, 7-Step Concepts
- 38th percentile – Run Block Grade on Gap Runs
- 27th percentile – Pass Block Grade w/ No Play Action
- 17th percentile – Negatively Graded Run Blocks (Lower is better in this metric, meaning fewer negatively graded run blocks.)
Dylan Cook: The Steelers May Have Found Their Swing Tackle
Dylan Cook’s emergence was one of Pittsburgh’s better stories in 2025. An undrafted tackle who spent time developing on the practice squad, Cook appeared in five games and started four for Pittsburgh. He’ll be 29 on the final game of the season on Monday night.
Cook finished the season with a 76.0 overall PFF grade, including an 80.7 pass-blocking grade that ranked eighth among qualified NFL tackles. Those numbers support what many Steelers fans saw late in the year a player who looked comfortable protecting the quarterback and earned the coaching staff’s trust.
Cook’s Metrics Breakdown
- 80th percentile – Pass Block Grade
- 83rd percentile – Pass Block Grade on True Pass Sets
- 86th percentile – Pass Block Grade with No Play Action (Elite)
- 77th percentile – Pass Block Grade on 5- & 7-Step Drops
- 71st percentile – Run Block Grade on Zone Runs
- 56th percentile – Run Block Grade on Gap Runs
- 56th percentile – Positively Graded Run Block Percentage
Cook’s Outlook
Cook’s profile mirrors what teams want from a reserve offensive tackle: high-level pass protection with an improving run game. He doesn’t need to be a Pro Bowler to provide tremendous value. If his development continues, Pittsburgh may have solved one of the toughest jobs on an NFL roster the dependable swing tackle who can step in without the offense missing a beat.
Player Metrics Comparisons
PASS BLOCK GRADE
- Zach Frazier – 88th percentile
- Dylan Cook – 83rd percentile
- Mason McCormick – 80th percentile
- Spencer Anderson – 68th percentile
- Troy Fautanu – 67th percentile
- Broderick Jones – 24th percentile
PASS BLOCK GRADE ON TRUE PASS SETS
- Mason McCormick – 83rd percentile
- Dylan Cook – 71st percentile
- Zach Frazier – 65th percentile
- Troy Fautanu – 58th percentile
- Spencer Anderson – 14th percentile
- Broderick Jones – 13th percentile
PASS BLOCK GRADE W/ NO PLAY ACTION
- Zach Frazier – 87th percentile
- Mason McCormick – 86th percentile
- Spencer Anderson – 79th percentile (tie)
- Dylan Cook – 79th percentile (tie)
- Troy Fautanu – 66th percentile
- Broderick Jones – 27th percentile
PASS BLOCK GRADE ON 5, 7 STEP CONCEPTS
- Zach Frazier – 87th percentile
- Dylan Cook – 80th percentile
- Mason McCormick – 77th percentile
- Troy Fautanu – 66th percentile
- Spencer Anderson – 30th percentile
- Broderick Jones – 22nd percentile
RUN BLOCK GRADE ON GAP RUNS
- Dylan Cook – 88th percentile
- Zach Frazier – 71st percentile
- Mason McCormick – 56th percentile
- Spencer Anderson – 23rd percentile
- Troy Fautanu – 7th percentile
- Broderick Jones – 6th percentile
RUN BLOCK GRADE ON ZONE RUNS
- Dylan Cook – 73rd percentile
- Mason McCormick – 71st percentile
- Zach Frazier – 69th percentile
- Spencer Anderson – 47th percentile
- Troy Fautanu – 41st percentile
- Broderick Jones – 19th percentile
FINAL STABLE METRIC
- Dylan Cook – 96th percentile
- Zach Frazier – 68th percentile
- Mason McCormick – 56th percentile
- Troy Fautanu – 42nd percentile
- Broderick Jones – 12th percentile
- Spencer Anderson – 7th percentile
Photo Credit Frank Hyatt/College2Pro.com
