Carson, 26, emerged as a reliable part of Seattle's offense in the 2018 and 2019 seasons, exceeding 1,100 yards on the ground in each campaign.
But 2020 was a struggle. Injuries limited him to just 12 games and 681 rushing yards and five touchdowns, though he did add 37 receptions for 287 yards and another four scores. A fractured hip ended his season in December.
But it was clear the Seahawks had unearthed a keeper in Carson, and the sides agreed to a two-year, $10.4 million extension in the offseason.
"It was the team that gave my first shot in the league, so I felt like it was the right decision," he told reporters in May. "... It was definitely difficult, the whole process. Teams made offers, there were definitely some teams that made it tough to sign with the Seahawks, but it was just the right feel. I prayed about it, me and my family talked about it, and we knew Seattle was the right fit."
Carson is a key part of Seattle's offense. While he's out, look for Alex Collins to serve as the team's starter.