The eight-year veteran had 11 combined tackles in the Seahawks' 21-12 victory. After Cowboys and Seahawks players left the field at AT&T Stadium, Thomas ran past Dallas players and eventually into the locker room.
He stopped at Garrett and said: "If y'all have the chance, come get me," according to the Dallas Morning News.
Thomas was the No. 14 overall pick by the Seahawks in the 2010 NFL Draft. The six-time Pro Bowler and three-time All-Pro is under contract in 2018, but hits free agency in 2019.
Thomas elaborated when he talked to reporters in the Seahawks' locker room.
"I've always been a Cowboys fan growing up. The biggest thing when I said 'come get me,' I didn't literally mean, 'come get me now,'" Thomas told reporters, according to NFL.com.
"I'm still in the prime of my career, I still want to be here. But when Seattle kicks me to the curb, please, the Cowboys, come get me. You know? This is the place where I want to be when they kick me to the curb. So that's what I meant by. People take me too serious. That's just who I am."
Earl Thomas on his "come get me" comments to Cowboys coach Jason Garrett: "I didn't mean literally come get me now ... but when Seattle kicks me to the curb, yeah come get me." pic.twitter.com/Zp57WSObyw— Seattle Times Sports (@SeaTimesSports) December 25, 2017
Thomas is due $10.4 million in 2018. He is the No. 14 safety and has a high quality rating, according to Pro Football Focus.