Jon
Gaines.
Jon
Gaines.
UCLA
"The rare fourth-round lineman whose evaluation aged perfectly: a mover with a mind for the job, undone at the top end by an anchor that never grew into the rest of his game."Pre-draft read
Interior offensive lineman built around movement. Gaines works best at right guard in a scheme that asks him to leave the line of scrimmage: he is quick out of his stance, comfortable on short pulls and skip pulls, and he can climb to a second-level linebacker without losing his tracking angle. UCLA leaned on that mobility to lead the Pac-12 in rushing.
The versatility is the second trait. He took snaps at center, right tackle and both guard spots, and the mental side of the job — calls, identifications, stunt pickup — was never the issue. In pass protection he sets quickly but plays a beat too tall, and his hands wander, so sustain becomes a strength question late in reps. He is a mover first and an anchor second.
Wide zone and gap-scheme hybrid that asks interior linemen to pull, climb and block in space rather than anchor one-on-one
Year 1: swing interior backup covering all three spots and a jumbo package body. Ceiling: starting guard in a movement-based run game with help against heavy nose tackles.
A drop-back passing offense with a power-based protection scheme that leaves guards isolated on 340-pound zero techniques on true drop-backs; the anchor breaks down before the help arrives.
Best used next to a strong center who can take over the double team early and free him to climb.
UCLA OL Jon Gaines II is a Versatile Lineman That Your NFL Team Needs
Pre-draft film breakdown of his pulls, climbs and the technique flaws that show up in protection.
UCLA Offensive Line vs Hawai'i (2021)
Full offensive line cut-up from the season he rotated between center, tackle and guard.
Cardinals Rookie Profile: Jon Gaines is Versatile Chess Piece
Post-draft breakdown of how Arizona planned to deploy his positional flexibility.
Gaines is a move-blocking interior lineman whose value comes from range and football intelligence rather than raw power. He is at his best pulling across the formation or working combination blocks to the second level, where his quickness lets him beat linebackers to the spot. Ask him to sit down and absorb a bull rush from a heavy nose and the picture changes.
The résumé backs the projection. He appeared in 45 career games with 30 starts, and his last two seasons were the real evaluation: 12 starts in 2021 while lining up at center, right tackle and right guard, then all 13 games at right guard in 2022 for a UCLA offense that averaged 237.2 rushing yards per game, sixth in FBS. He earned honorable mention All-Pac-12 and a Pac-12 Offensive Lineman of the Week nod. The flags were technical — sloppy hand placement, a tendency to lunge, and core strength that gave way midrep.
Boards read him as a Day 3 interior backup with starter upside if the technique caught up, and the positional flex made him worth more than his tape alone. Arizona took him at 122 as a swing interior piece for a rebuilding front, exactly the kind of bet you make in the fourth round.
- 01
Pull and reach quickness
Gets out of his stance cleanly and executes both short traps and long skip pulls, arriving with the tempo the play design needs.
- 02
Second-level tracking
Climbs to linebackers under control and takes accurate angles, a big reason UCLA ranked sixth in FBS in rushing his final year.
- 03
Positional versatility
Logged real starts at center, right tackle and right guard across his career, which makes him a three-spot answer on a game day roster.
- 04
Football intelligence
Handles calls, front identifications and stunt exchanges without help; coaches never had to simplify the job around him.
- 05
Setup speed in protection
Quick to establish position against interior rushers and rarely gets beaten by the first move on straight drop-back reps.
- 01
Core strength
Gives ground against heavy nose tackles and gets walked back when the rush converts speed to power, which caps his snap count on obvious passing downs.
- 02
Hand placement
Hands drift wide or land late, so his blocks come off early in the run game even after he wins the initial leverage battle.
- 03
Balance in space
Lunges when he has to mirror a moving target and ends up on the ground more than a mover of his quality should.
- 04
Durability
A knee injury wiped out his entire rookie season and delayed the technical development an interior project most needed early.
| Yr | Team | G |
|---|---|---|
| 2018 | UCLA | 1 |
| 2019 | UCLA | 12 |
| 2020 | UCLA | 7 |
| 2021 | UCLA | 12 |
| 2022 | UCLA | 13 |
| Career | — | 45 |
Season games and starts sum exactly to the 45 G / 30 GS career line (UCLA official roster bio). Offensive linemen do not carry counting stats; no production keys are fabricated.
A dash means the figure is not published by a source we trust — never a zero we invented.
Versatile interior backup who covers guard and center, spot-starts when needed and sticks on rosters for his flexibility.
Movement-first interior lineman who grew into a multi-year starter once the strength caught up to the technique.
Athletic small-school interior body whose lack of anchor kept him from converting practice squad reps into steady snaps.
Everything above is the pre-draft evaluation. This section is what actually happened — updated year over year.
The rookie season disappeared. Gaines spent all of 2023 on injured reserve with a knee injury, which cost him the developmental year an interior project needs most. He returned in 2024 and appeared in 13 games without a start, working as the backup interior lineman and taking snaps at fullback and on special teams — the kind of utility role that keeps a fourth-round pick on a roster. In 2025 the volume grew: 17 games with five starts, all five coming in the final stretch of the season as Arizona reshuffled a front that finished 31st in rushing. He entered the 2026 season still in the Cardinals' interior rotation, four years in, with 30 games and five starts to his name.
In hindsight the evaluation was accurate almost to the word. He became what the reports said he would become: a smart, versatile interior backup who can cover multiple spots and spot-start without sinking the offense. The knee injury cost him a year he could not afford, and the strength questions never fully resolved, which is why the starting job never became his. For pick 122, a durable role player who has stuck with his original team for four seasons is a fair return, not a miss.