In exchange for Bennett and Seattle's seventh-round pick, Philadelphia will send a fifth-round selection and wideout Marcus Johnson.
"You fans are world class," Bennett wrote. "The way you support us players on and off the field, helping to build bridges across our communities and understand what it means to give back and be community-minded. I am forever grateful for allowing me to grow and evolve in this time that I've had with you."
If the landing spot is surprising, Seattle's decision to move the 32-year-old Bennett comes as no shock after weeks of speculation that he would be dangled to interested suitors.
Make no mistake about it, Bennett -- a three-time Pro Bowler entering his 10th season -- can still play. Spending much of his career as one of the league's most underrated game-changers, Bennett is one of just 12 players with five-plus sacks in each of the last six seasons and one of just eight defensive lineman to make each of the last three Pro Bowls.
One of the most active wheelers-and-dealers league-wide, the Eagles have just begun fine-tuning for another deep playoff run.