Can Dan Mullen Unlock What Oklahoma and Auburn Could Not in Jackson Arnold?

LAS VEGAS — Dan Mullen has already been credited with fixing Jackson Arnold before UNLV has decided who will take the first snap.

Ryan Brown of Next Round Live recently predicted that Arnold would “flourish at UNLV” and that Mullen would “unlock him.” Brown said an Arnold turnaround would make Hugh Freeze look worse and strengthen Mullen’s reputation as a quarterback developer.

The idea is easy to understand. Arnold struggled at Oklahoma and Auburn, transferred to the Mountain West and joined a coach with a long history of productive quarterbacks. The more important questions are what happens when the first answer disappears and whether Arnold’s accuracy holds once a play is disrupted.

That is the part Mullen actually has to change.

Arnold’s arm strength, mobility and five-star recruiting background have never been difficult to see. Oklahoma and Auburn saw enough talent to make him their starting quarterback, and his high school evaluations described a player who made quick decisions, threw accurately and could escape pressure without immediately abandoning the pass.

Arnold won the 2022 Elite 11 Finals MVP, and evaluators praised how quickly and accurately the ball came out. UNLV offensive coordinator Corey Dennis, who recruited Arnold at Ohio State, remembers a quarterback who trusted his arm and did not wait for every window to become obvious.

His first Oklahoma start showed both sides of that confidence. Arnold passed for 361 yards and two touchdowns against Arizona in the 2023 Alamo Bowl, but he also threw three interceptions. Pro Football Focus credited him with five turnover-worthy plays and three big-time throws. He challenged windows that closed faster than he expected and produced turnovers alongside explosive plays.

Arnold entered his first full season as Oklahoma’s starter needing to become more responsible with the football. He did. The turnovers declined, but the passing production went with them.

He threw for 1,421 yards and 12 touchdowns while averaging 5.8 yards per attempt and taking 34 sacks in 2024. Arnold threw only three interceptions in 246 attempts, leaving an interception total that looked responsible inside an offense that often looked restricted.

Arnold held the ball looking for cleaner answers, allowed pressure to become sacks and used his legs when the passing option did not immediately appear. Some of those scrambles produced useful yards. Others ended the original design before routes had time to develop.

The circumstances around him were difficult. Oklahoma dealt with extensive receiver injuries and constant offensive-line changes during its first SEC season. Arnold was benched after three first-half turnovers against Tennessee before eventually returning to the lineup.

Oklahoma produced one of its best results by leaning into what remained dependable. Arnold rushed 25 times for 131 yards in a 24-3 win over Alabama while completing nine of 11 passes for 68 yards. The Sooners used him as part of the running game, protected him from difficult passing situations and allowed their defense to control the afternoon.

Auburn believed it could get more out of him. Freeze signed Arnold after the 2024 season and compared his Oklahoma production with Bo Nix’s final season at Auburn. Nix improved after leaving Auburn for Oregon, and Freeze believed Arnold could make a similar jump after leaving Oklahoma.

The first two games gave Auburn reasons to believe it might happen. Arnold rushed for a career-high 137 yards and two touchdowns in a 38-24 victory at Baylor. A week later, he completed 24 of 28 passes for 251 yards and three touchdowns against Ball State, largely through defined short and intermediate throws. His average depth of target was 7 yards.

Both games played to strengths Arnold had already shown. Auburn leaned on the running game and his legs against Baylor, while Ball State gave him defined throws underneath.

The problems returned when stronger opponents took those answers away. Oklahoma sacked Arnold nine times during his return to Norman. Texas A&M and Georgia held him under 140 passing yards, and Missouri sacked him five times before Auburn eventually went in another direction at quarterback.

Arnold finished the season with 1,309 passing yards, six touchdowns and two interceptions while adding 311 yards and a team-high eight touchdowns on the ground. He threw five interceptions across his final two seasons at Oklahoma and Auburn and still lost the starting job at both schools.

Protecting the football did not protect him.

The change from the Alamo Bowl to Auburn is difficult to ignore. Arnold went from challenging too many windows to waiting for them to become clear. There is no way to prove that one benching, coach or offensive system caused that change. Oklahoma’s injuries and offensive-line problems mattered, and Auburn had its own instability under Freeze.

The way Arnold played changed anyway.

Young Arnold was willing to take chances before fully understanding which ones were reasonable. The later version often appeared unwilling to take the chance until the answer became certain. College windows rarely provide that certainty.

Arm talent has rarely been the issue with Arnold. His problems have shown up when the play moves beyond its initial structure. When the first read is available, he can play quickly. When the picture changes, he has too often held the ball, left the pocket or waited for a cleaner window until pressure ended the play.

PFF saw problems with anticipation and timing in Arnold’s Oklahoma film, and Auburn film reviews later found similar hesitation. Through Auburn’s 3-0 start, Arnold carried a 90.1 PFF grade from a clean pocket and a 33.5 grade under pressure. His pressure grade at Oklahoma the previous season was 33.9.

The circumstances changed at Auburn. His performance under pressure barely did.

After the Oklahoma game, Freeze estimated that approximately half of the sacks resulted from protection failures and half came from situations where Arnold needed to trust a receiver in one-on-one coverage and release the ball. An Auburn Observer review using PFF tracking had Arnold averaging 2.97 seconds to throw overall and 4.31 seconds on plays that became sacks.

Not every sack belonged to Arnold. Enough lasted long enough for his decision to become part of the result.

Pressure has created two different problems. When it arrives quickly, Arnold can trust his legs and leave the passing structure before routes develop. When it arrives later, he can hold the ball while waiting for the picture to clear. UNLV is trying to shorten that hesitation without turning him back into the quarterback who forced too many throws at Oklahoma.

That pattern has appeared during the portions of UNLV fall camp open to the media.

Arnold often looked comfortable when the first read was available. He could identify the matchup, get the ball out and make the type of throw expected from a quarterback with 18 career starts. The offense became less consistent when the initial answer disappeared. Arnold sometimes held the ball while waiting for a clearer window, and his ball placement became less dependable when his timing or feet were disrupted.

Not every rep asked Arnold and Alex Orji to make the same read against the same coverage. Protection, receiver separation and the progression built into the play all affected how quickly the ball came out. The pattern was still visible often enough to resemble what followed Arnold through Oklahoma and Auburn.

Mullen’s comments throughout camp have not suggested those questions are settled.

When asked whether the quarterbacks and receivers were becoming more synchronized, Mullen said it was happening “at times” and that the group needed to continue improving. He emphasized that quarterbacks can never receive enough repetitions before acknowledging, “We’re still learning.”

As UNLV began preparing specifically for Memphis, Mullen said the quarterbacks were “getting there” and becoming more comfortable. The next challenge was applying the offense to a game plan with specific checks against an unfamiliar defense.

The national reclamation story has moved faster than the work required to make it real.

Mullen had already started working on the problem during the spring. Arnold said the staff wanted him to remain a passer when he moved outside the pocket instead of immediately trusting his legs. Dennis reduced the larger message to three words when he told Arnold to “trust every throw.”

Mullen is not trying to teach Arnold to make throws he has never been capable of making. He is trying to get him to make throws he gradually stopped trusting himself to attempt. Arnold needs some of the aggressiveness he showed early in his career without giving back the ball security he learned later.

The goal is not recklessness. It is anticipation.

UNLV will see whether Arnold trusts the receiver before the window becomes obvious, stays with the pass when the pocket changes and remains aggressive after a mistake. Mullen’s job is to create better answers without removing Arnold’s responsibility to make the difficult ones.

Then there is Orji.

Mullen has not publicly named Arnold or Orji the starter, but he has made one part of the plan clear.

“They might not have a starter, but both ours are going to go,” Mullen said.

Arnold lost starting jobs at Oklahoma and Auburn. He now enters another season knowing the offense will not belong exclusively to him. Mullen used Orji alongside Anthony Colandrea before Orji’s season-ending injury last year, and Orji’s physical running ability gives UNLV another package without requiring Arnold to handle every designed quarterback carry.

The rotation can help if the roles are defined. The concern comes if it becomes reactive. If Orji enters only after Arnold struggles, a planned two-quarterback system can start looking like an evaluation of every mistake.

Mullen does not have to explain those roles publicly. Arnold and Orji need to understand them.

Mullen’s quarterback history is part of the reason Arnold’s move to UNLV has drawn so much attention. Alex Smith, Tim Tebow, Dak Prescott and Kyle Trask did not play the position the same way, and Colandrea provides a more relevant example because Mullen just went through the process at UNLV.

Colandrea arrived from Virginia with 17 starts, 4,083 passing yards and an aggressive style that had also produced 20 interceptions. He threw for 3,459 yards and 23 touchdowns last season, completed a UNLV-record 65.9% of his passes and added 649 rushing yards and 10 scores. Colandrea was named the Mountain West Offensive Player of the Year while leading UNLV to 10 wins and a third consecutive conference championship game.

Mullen did not make Colandrea cautious. He gave him better places to be aggressive.

UNLV made Colandrea’s mobility part of the plan through designed runs, run-pass options and movement throws instead of waiting for the pocket to fail. The offense allowed him to remain aggressive without requiring every possession to depend on an improvised throw.

Arnold needs something different. He has to become more willing to attack without becoming reckless. Colandrea does not guarantee Mullen can produce the same result with Arnold, but it does show Mullen and Dennis are willing to coach two quarterbacks in opposite directions.

Colandrea needed to learn when not to force the throw. Arnold needs to learn when avoiding it creates a different problem.

Mullen can give Arnold cleaner answers through play-action, moving pockets, quarterback runs and quick throws attached to the running game. He can establish clearer rules for what happens as the play develops.

He cannot remove every difficult situation.

The first read will sometimes be covered. Pressure will reach the pocket. Third-and-long will eventually force Arnold to anticipate a throw without Mullen manufacturing an obvious answer.

Mullen can improve the conditions. Arnold still has to solve the play.

Memphis should provide an immediate test. Lance Guidry’s defense will disguise pressure, change the picture after the snap and eventually force Arnold to operate without the easy throw. A receiver will lose a matchup. The pocket will move. Arnold will miss a throw. Orji will also enter the game.

That is when the evaluation of Arnold really begins.

A high completion percentage built on screens, run-pass options and first-read throws will not answer what followed him from Oklahoma to Auburn. The more important snaps will come on third-and-long, after the pocket moves or when the first receiver is covered.

Does Arnold take the sack? Does he leave too early? Does he anticipate the next window and throw before the receiver appears completely open?

The throw still has to be accurate. Arnold’s ball placement has been more reliable when the throw is defined and his feet are set. It has become less consistent when his timing or platform changes. Getting the ball out quickly does not help if receivers have to stop, turn or reach behind themselves.

UNLV also cannot build the entire passing game around safe completions and quarterback runs. Jai’Den “Jet” Thomas returns after rushing for 1,036 yards and 12 touchdowns. Defenses will begin by trying to stop him and make UNLV’s quarterback beat them through the air.

Arnold has to give them a reason to stop.

That does not require 4,000 passing yards. UNLV needs enough intermediate and vertical production to keep defenses from crowding Thomas and treating the quarterbacks as another part of the running game. Arnold should have advantages at UNLV, including more stability and a Mountain West schedule that will not bring the same weekly defensive depth as the SEC.

None of that automatically fixes him.

If Arnold succeeds, it will not prove Oklahoma and Auburn caused everything that went wrong. Another year of experience, different competition and UNLV’s personnel will matter, too. It would show that Mullen found a more productive way to use him.

The national prediction has already been made. Mullen will unlock Arnold, Arnold will flourish and everyone will look back at Oklahoma and Auburn as the places that failed him.

UNLV has not reached that point.

Spring showed the same hesitation had not disappeared. Fall camp produced quicker decisions when the answer was defined, but the timing and ball placement remained inconsistent when the play changed. That is not evidence the experiment is failing. It is evidence that Arnold has not been fixed simply because he transferred.

Mullen does not need to win an argument with Freeze or Brent Venables. He needs Arnold to play decisively when Memphis changes the picture and forces him beyond the first read.

The arm and running ability have never disappeared. On Aug. 29, UNLV gets its first real look at whether the hesitation has.