The Seattle Seahawks enjoyed a Week 1 win against the Denver Broncos at Lumen Field on Monday, but it was not all good news.

Pro Bowl safety Jamal Adams left the game with what coach Pete Carroll later described as a "serious" knee injury.

Adams – who has suffered shoulder and finger injuries in recent seasons – had made three tackles by the time he had to leave the game, which Seattle narrowly won after touchdowns from Will Dissly and Colby Parkinson and a field goal from Jason Myers, all in the first half.

"[Adams] hurt his knee tonight," Carroll said after the game. "Not a typical knee injury. His quadricep tendon got damaged some tonight. He got hurt, it's a serious injury."

Fellow safety Quandre Diggs expressed sympathy for Adams, relating how he had witnessed his team-mate's eagerness to make his mark from close quarters.

"It sucks, man," Diggs said. "This guy's had a hell of a camp, he's had a hell of an offseason, and you hate to see it, especially with Jamal being one of my closest friends.

"It's tough. We kind of had the same offseason where it was just rehab and trying to get back to be the leaders of this team and the leaders of this defense.

"It's just hard to imagine. You go out there and you always have that doubt, like, 'Am I ready? Am I ready to go?'.

"It sucks the way it happened, and it sucks for him personally, because I know how much work he put in this past offseason and I know mentally he was in great space. He was the most comfortable he's been around here. It just sucks to see. I love him."