There's typically a flurry of activity during the National Football League (NFL) offseason as teams look to improve their rosters via the draft, trades, and free agency. This offseason was no different, as several marquee players changed teams, including Kirk Cousins signing with the Atlanta Falcons and Stefon Diggs joining the Houston Texans in a trade from the Buffalo Bills.

Several players, including three likely future Pro Football Hall of Fame inductees, also announced their retirement.

Jason Kelce

While his brother Travis might be known more outside of football, Jason Kelce is a well-respected center who will be remembered as one of the best players at his position. The 36-year-old native of Ohio announced his retirement in March 2024 after 13 seasons, all of which were with the Philadelphia Eagles. He ranks seventh all-time among centers in ProFootballReference.com's Approximate Value metric and is one of only three centers with at least six All-Pro selections. Moreover, Kelce was among the best at his position up until the end of his career, earning three consecutive All-Pro selections in his final three years.

Kelce was an unheralded sixth-round pick of the University of Cincinnati in the 2011 NFL Draft, but started all 16 games in his rookie season and was a beacon of consistency for the Eagles, starting all 193 games in which he played over 13 seasons. He won the Super Bowl with the Eagles in 2017.

Aaron Donald

Kelce's retirement was somewhat expected, but few people anticipated that Los Angeles Rams defensive tackle Aaron Donald would call it quits during the offseason. Donald, a three-time Associated Press (AP) Defensive Player of the Year, was just 32 years old when he announced his retirement in March, stating he was "burnt out" and "satisfied with what [he] was able to do in 10 years." Donald was the highest-paid defensive player in NFL history in 2018 when he signed a six-year, $135 million contract extension with the Rams.

Selected 13th overall by the Rams, Donald finished his career with 111 quarterback sacks, 543 tackles, and 24 forced fumbles in 154 games. He won the Super Bowl with Los Angeles in 2021 and, like Kelce, is a future Hall of Famer.

Fletcher Cox

Another all-time great Eagle, defensive tackle Fletcher Cox announced his retirement on March 10. Like Kelce, he spent his entire career in Philadelphia, recording 70 sacks, 519 tackles, and 16 forced fumbles in 188 games. Only Donald, Cameron Heyward, and Chris Jones recorded more sacks than Cox from 2012 to 2023. Cox was first-team All-Pro in 2018, played in six Pro Bowls, and was included on the Hall of Fame All-2010s Team.