--- title: "NFL front offices lock in stability as power shifts in Miami, Buffalo" description: "Miami resets with Jon-Eric Sullivan while Buffalo cements Brandon Beane's control; Atlanta's Ian Cunningham joins a rare power-sharing model." url: https://sportopod.com/en-US/cluster/the-nfl-s-longest-tenured-gms-86a5d065 published: 2026-07-03T03:47:38.188+00:00 updated: 2026-07-03T03:47:38.188+00:00 author: "Kostadin Stamboliev" publisher: "Pineido" site: "Sportopod" language: en topics: ["football"] --- # NFL front offices lock in stability as power shifts in Miami, Buffalo > Miami resets with Jon-Eric Sullivan while Buffalo cements Brandon Beane's control; Atlanta's Ian Cunningham joins a rare power-sharing model. The NFL’s front-office carousel barely spun this offseason, with only three GM vacancies leaguewide. Miami moved on from Chris Grier, tabbing Jon-Eric Sullivan as his successor. Atlanta bucked tradition by installing Ian Cunningham under a unique power structure that splits final authority. Minnesota bucked convention again, hiring Nolan Teasley in a rare post-draft front-office addition. Buffalo, meanwhile, doubled down on stability, further cementing Brandon Beane’s iron grip on the Bills’ football operations. The Dolphins’ reset under Sullivan caps a two-year purge that began with Tua Tagovailoa’s rookie extension and now extends to the executive suite. Sullivan inherits a roster built for contention but faces immediate questions about quarterback development and salary-cap management. His first test arrives in Week 1 against the Ravens, where the Dolphins’ offensive line—already a league-worst unit—must hold the fort. Atlanta’s power experiment is the offseason’s boldest front-office play. Cunningham joins a structure where Matt Ryan, Kwesi Adofo-Mensah, and ownership share final say, a model designed to prevent single-point failures. The Falcons’ 2024 draft capital—including a top-10 pick—now sits under a committee, not a czar. Early whispers suggest Cunningham’s role leans toward roster construction, but the chain of command remains deliberately murky. Minnesota’s late hire of Nolan Teasley signals a rare mid-cycle front-office expansion. Teasley, a former 49ers scout, replaces a departed executive and inherits a draft haul already committed to long-term projects. The Vikings’ 2025 draft capital is locked into a pair of Day 2 picks, leaving Teasley to navigate cap casualties and positional scarcity without the usual rebuild runway. Buffalo’s refusal to entertain external candidates underscores a league-wide trend: when it works, don’t fix it. Beane’s 2024 roster is a Super Bowl contender, built on a foundation of draft capital and cap discipline. The Bills’ front office has operated as a closed system for five years, and the results—back-to-back AFC East titles—speak for themselves. No other team has matched their consistency. "Stability isn’t sexy, but it’s the difference between contending and rebuilding," a league exec told Sportopod. "When you have a GM with five years of institutional knowledge, the roster reflects it. That’s why Buffalo’s model is the one everyone’s copying, quietly." What’s next: Sullivan’s first full offseason will reveal whether Miami’s reset is a reset or a retreat. Atlanta’s power-sharing model faces its first real test in the draft, where Cunningham’s influence will be measured in picks, not promises. Teasley’s arrival in Minnesota accelerates the Vikings’ timeline, forcing early decisions on veterans due for extensions. And Buffalo? They’ll keep doing what they’re doing—winning, drafting, and ignoring the carousel entirely. ## Why this matters Executive tenure shapes franchise culture and roster identity. With only three GM vacancies this offseason, the league's architect class is consolidating power in Miami, Buffalo, and Atlanta. Understanding who holds the final say in these front offices is key to projecting future roster construction and team direction. ## Frequently asked ### Who replaced Chris Grier as Miami Dolphins GM? The Dolphins hired Jon-Eric Sullivan as their new general manager after Chris Grier's departure. ### How did Buffalo Bills solidify Brandon Beane's control? Buffalo Bills reinforced Brandon Beane's authority by maintaining his role as GM without external hires or structural changes. ### What makes Atlanta Falcons' new GM hire unique? Atlanta brought in Ian Cunningham under a rare power-sharing structure, diverging from traditional GM models. ### How many GM vacancies were there in the NFL this offseason? There were only three GM vacancies across the NFL this offseason, highlighting the league's stability trend. ### Who is Nolan Teasley and where did he land? Nolan Teasley is a rare post-draft hire who joined the Minnesota Vikings as part of their front-office reshuffle. ## Sources & Citations - [The NFL’s Longest-Tenured GMs](https://www.profootballrumors.com/2026/07/the-nfls-longest-tenured-gms-4) — Pro Football Rumors (2026-07-02) --- Cite: NFL front offices lock in stability as power shifts in Miami, Buffalo. Sportopod, 2026-07-03. https://sportopod.com/en-US/cluster/the-nfl-s-longest-tenured-gms-86a5d065