Following the game, head coach Pete Carroll characterized it as a "serious injury" that he believes is to Adams' quadriceps tendon.
Carroll offered no timeline in regard to Adams' availability or any further information.
Adams made a tackle on Broncos quarterback Russell Wilson, spinning him to the ground before yelling out in pain. Adams limped to the sideline and appeared to be putting no weight on his left leg. Adams immediately entered the medical tent, and shortly afterward was carried onto the cart and taken to the locker room.
Josh Jones took over at safety for Adams.
Adams, a fifth-year safety, has been considered a key piece of the Seahawks' secondary since they acquired him through a trade with the Jets in 2020, sending two first-round picks to New York among other compensation. They also made him one of the highest-paid players at his position with a four-year deal worth $70 million. But since coming to Seattle, he's missed a combined nine games over two seasons.
In the 2020 season, he was out for four games with a groin injury and later was limited in the postseason with a shoulder injury. His 2021 season ended early with surgery on his shoulder after Week 13.
Most recently Adams revealed he had broken a finger during training camp and would wear a cast during games this season before possibly having surgery next offseason. Adams said last week that he was "ready to go" for this season, but Monday night's developments seem to have marked yet another setback.