Seattle Seahawks strong safety Kam Chancellor hinted at retirement in a long, vague Twitter post on Sunday, in which he cited his neck injury as a reason for stepping away from football. Seahawks Safety Kam Chancellor Hints At Retirement Gods Grace ?????? pic.twitter.com/60J2DugpD1 — Kameron Chancellor (@KamChancellor) July 1, 2018 "To walk away from the game by choice is one thing, to walk away from the game because of the risk of paralysis is another," 30-year-old Chancellor, who played his whole eight-year NFL career with the Seahawks, wrote. SLIDESHOW: 30 Best Sports Instagrams! After sustaining a severe neck injury last year, Chancellor revealed in May that he would only keep playing if he was in sufficiently good health. "If my body says don't play, I'm not playing. I'll listen," Chancellor told 13News Now in May. "I'm a very good listener." On Sunday, the safety struck a different tone. "I've played through all types of bruises and injuries at a high level. But this one, I just can't ignore," he wrote on Twitter. Chancellor, a four-time Pro Bowler, signed a three-year, $36 million extension with the Seahawks last summer. According to ESPN, his 2018 salary of $6.8 million "became fully guaranteed in February, and $5.2 million of his $10 million salary for 2019 is guaranteed for injury." SLIDESHOW: 10 Highest-Paid Athletes Seattle signed two safeties this offseason: they re-signed Bradley McDougald to a three-year deal, and also signed Los Angeles Rams starting safety Maurice Alexander to a one-year contract. The Seahawks drafted Chancellor as a fifth-round pick out of Virginia Tech in 2010. He helped lead Seattle to a 43-8 Super Bowl victory over the Denver Broncos after the 2013 season.