Cole Sullivan Emerging as a Key Piece in Michigan’s Defensive Future

Through the 2025 season, sophomore linebacker Cole Sullivan has steadily become one of the most intriguing young players on Michigan’s defense. The 6-foot-3, 230-pound Pittsburgh native has taken on a larger role in his second year with the Wolverines, showing a blend of athleticism, instincts, and playmaking ability that has coaches and fans excited about his future in Ann Arbor.

Sullivan came to Michigan as a highly regarded four-star recruit out of Central Catholic High School in Pennsylvania. Known for his versatility — having played both linebacker and safety in high school — he brought the kind of range and intelligence that fit perfectly within Michigan’s defensive scheme. His transition to college football began primarily on special teams, but as his understanding of the defense grew, so did his playing time and on-field confidence.

Now in 2025, Sullivan has become a consistent contributor for the Wolverines. Through the first half of the season, he’s recorded 27 total tackles, 2 sacks, and 3 interceptions, according to official team and ESPN statistics. The 3 interceptions were key in changing the momentum in Michigan’s favor and those numbers highlight his ability to impact games in multiple ways — from rushing the passer to dropping back in coverage. His combination of size, speed, and mobility has made him a valuable piece in defensive coordinator Wink Martindale’s system, which relies heavily on linebackers who can adapt to both run and pass responsibilities.

While he’s not yet the vocal leader of Michigan’s defense, Sullivan’s play has spoken loudly. Coaches have praised his preparation, discipline, and football IQ — traits that have allowed him to earn meaningful snaps alongside more experienced players. His growth has been particularly noticeable in his ability to read plays before they develop, a skill that often separates good linebackers from great ones.

Teammates describe Sullivan as quiet but focused, someone who approaches each week with professionalism beyond his years. That mindset has helped him make the most of every opportunity, whether it’s making a key tackle in space or breaking up a pass over the middle. As Michigan continues its push through the Big Ten schedule, his development adds depth and flexibility to a defense that prides itself on being one of the most complete units in college football.

Looking ahead, Sullivan’s role is expected to expand even further. With his versatility, work ethic, and steady improvement, he’s positioning himself as one of the foundational players for the next generation of Michigan defense. If he continues on this trajectory, he could soon become not just a reliable starter, but one of the team’s defensive leaders.

For now, Cole Sullivan represents what Michigan’s coaching staff values most — toughness, intelligence, and consistency. He’s still building his résumé, but his early production and potential suggest that the Wolverines have found another cornerstone for their defense. And as the season unfolds, Sullivan’s growth could quietly become one of the most important and inspiring storylines in Michigan’s pursuit of Big Ten dominance.