On Sunday night, Kam Chancellor "unofficially" announced his NFL retirement.
Although he hasn't made it official, perhaps to ensure his 2018 and 2019 salaries are granted, it appears that he's played his last game.
And Kam will be missed.
The strong safety entered the league back in 2010 and was drafted by the Seattle Seahawks as a fifth-round pick.
Even though he went quite late - Chancellor quickly established himself as a defensive great - and spent all eight years of his career in Seattle.
A SUCCESSFUL CAREER
During those years, Kam became a key part of the Legion of Boom and terrorized NFL offenses week in, week out.
The Seahawks dominated so much in 2013 and went all the way to Super Bowl 48 - and smashed the Dever Broncos 43-8.
They returned to the world championship game a year later, but in 2014, fell short against the New England Patriots.
Still, Chancellor won one Super Bowl ring and went to the Pro-Bowl four times before appearing to call it quits on Sunday. That's not a bad career at all.
PLAYTIME CUT SHORT
In his statement, Kam cited his 2017 season-ending neck injury, one suffered in week 10, as the reason he's had to cut his career short.
Following that announcement, tributes have been flooding in - and Seahawks fans can't believe they're never going to see him play again.
But it's not just fans who have been paying their thanks - as a number of his teammates have offered public tributes to number 31.
Quarterback Russell Wilson was one of the first, replying directly to Chancellor's tweet with a heartfelt message.
Now, Wilson's tribute came straight from the heart - but the tribute from another of Chancellor's teammates, Earl Thomas, didn't quite have the same effect.
THOMAS'S ODD MESSAGE
Thomas and Chancellor have shared everything on the field together for the last eight years. The safeties have won it all and suffered some devastating losses along the way too.
So, you'd think that Earl would at least take the time to put some thought into his message to Kam.
But that didn't happen. Instead, he posted a picture of himself walking through an airport, captioned:
"A lot is going on in sports just touch down to hear that 31 retired. Good luck on the next chapter."
Right. That seems a little odd. Surely he could have mustered up something more than two sentences and a picture of himself?
We could be being a little hard on Thomas - maybe he's actually so devastated with the news that he doesn't want to think about what's going to happen without Kam on the field.
Then again, maybe not.