King was waived by the Chiefs on Friday. The Chiefs activated linebacker Justin March from injured reserve Friday and evidently needed King's roster spot in order to do so. If King clears waivers, he'll more than likely end up on the Chiefs' practice squad.
King was promoted from the practice squad to the Chiefs active roster Saturday. King was waived by the Chiefs in November, but subsequently cleared waivers and landed on the team's practice squad. However, he has been promoted back to the active roster due to veteran linebacker Derrick Johnson being placed on injured reserve.
King was waived by the Giants on Monday. King was promoted to the active roster prior to Week 9. He will presumably return to the practice squad if he clears waivers. Jarvis Jenkins was subsequently signed by the team in a correlated roster move.
King was promoted to the Chiefs' active roster on Saturday. King has just four tackles (two solo) throughout his career thus far after being drafted in the seventh round of the 2013 NFL Draft by the Eagles. He'll provide depth at nose tackle behind Dontari Poe for Kansas City.
The Seahawks have listed the following players as inactive for Sunday's Super Bowl: B.J. Daniels, Marcus Burley, Patrick Lewis, Keavon Milton, David King, Garry Gilliam and Kevin Norwood, the team announced. Gilliam caught a fake field goal touchdown during the NFC Championship Game for Seattle. The game is currently pick'em between Seattle and New England.