Former Michigan linebacker Cole Sullivan returns to Ann Arbor in a Sooner uniform, balancing personal friendships with the grit required to dismantle his old team’s offense
Sooners linebacker Cole Sullivan does not need a speech to understand what this week means.
Oklahoma is going to Ann Arbor, and the Sooners’ new linebacker is getting ready to play his former team in only his second game in crimson and cream.
“Yeah I'm just excited to play against some of my former teammates, some of my good friends over the past couple of years, so looking forward to that,” Sullivan said.
There is no fake hostility in that answer. There does not need to be. Sullivan spent real time at Michigan, built relationships there, and then left for Oklahoma in the portal era like so many players do now. The friendship piece is still real. The game-day piece is separate.
“I think it is kinda understood that we're buddies off the field. We all know that once we're in between the lines, we're not friends in that moment. So we're just going to play the game how we normally do.”
That is the healthiest way to handle a reunion game. Acknowledge the history, then drop it when the ball is snapped. Oklahoma does not need Sullivan to turn this into a personal revenge story. It needs him to play clean, physical football in a hostile environment and help a defense that already has enough talent to make Michigan uncomfortable.
Sullivan’s Oklahoma career is still in the earliest stage. In the Sooners’ season-opening win over UTEP, he played 20 defensive snaps and recorded one solo tackle. That is not a starring debut, and it does not have to be. Brent Venables is not asking a brand-new linebacker to carry the defense in Week 2. The value is depth, intelligence, and another player who has already seen Big House football from the other sideline.
The résumé that got him to Norman is much louder than the UTEP box score. In 2025 at Michigan, Sullivan finished with 44 tackles, 5.0 tackles for loss, 2.0 sacks, three interceptions, four pass breakups, a forced fumble, and a fumble recovery. He earned three late-season starts and played like a linebacker who could affect the game in coverage as well as against the run. That interception total stands out. Not every linebacker produces that kind of ball production in a breakout year.
There is also the direct history with Oklahoma. In last season’s meeting on September 6, Sullivan played against the Sooners and posted three tackles, a sack, and a fumble recovery in Michigan’s loss. He was one of the Wolverines who actually left a mark in a game Oklahoma controlled.
Now the jersey is flipped. Same opponent file, opposite sideline.
That is what makes this different from a normal transfer debut on the road. Sullivan has already felt this matchup. He has already heard this crowd. He has already prepared for Oklahoma’s skill players and offensive structure once before. The difference is that now he is studying Michigan’s personnel and tendencies from the outside.
He knows Bryce Underwood as a former teammate, not just a scouting report.
“He's a good dude. He's super confident,” Sullivan said. “I don't think he teeters. I don't think he crosses a line of being too cocky. He's very confident. He's a good leader for that team, and for how young he is, he's very mature.”
That tracks with the larger Underwood conversation. The talent is obvious. The confidence is part of the package. The question for Saturday is whether Michigan can get enough clean plays around him to make that confidence productive again after the Western Michigan mess.
Sullivan is not going to trash a former teammate, and he should not. His job is to help Oklahoma crowd the short field, close throwing windows, and make Underwood uncomfortable when the first read disappears.
As for Michigan’s last-second escape in Week 1, Sullivan did not sound interested in turning it into bulletin-board material.
“That was a crazy game. It's definitely not going to affect our process, our prep this week. We know they are a good team. Obviously, to be able to fight back like that, that shows their resilience.”
That is the mature read. Oklahoma would be foolish to mistake a messy Michigan win for a broken Michigan team. Whittingham’s roster still has talent, the building will be loud, and a one-score game can get sideways in a hurry if the Sooners start chasing ghosts.
Sullivan’s point is simple: respect the resilience, then stick to the process.
For Oklahoma, the practical upside of having him available this weekend is obvious. The Sooners already have established pieces at linebacker with Kip Lewis and Owen Heinecke. Sullivan gives them another body who can run, tackle, and potentially match up in space if Michigan tries to stress the second level. Even if the snap count stays modest, there is value in having a player who understands the environment and does not need a full tutorial on what this week feels like.
There is also a bigger roster theme around Oklahoma right now. The Sooners have continued adding experienced players into the season, looking for depth that can help on defense and special teams without needing a full offseason to contribute. Sullivan fits that profile better than most. He is not a developmental projection with no tape. He was a productive rotation piece and late-season starter at Michigan one year ago.
Saturday will not be defined by one linebacker’s reunion. It will be defined by whether Oklahoma can travel, stay disciplined, and force Michigan to play from behind.
He already said the quiet part the right way. Off the field, they are buddies. Between the lines, they are not.
