MONDAY, 4:40pm: Seahawks coach Pete Carroll told reporters, including Bob Condotta of the Seattle Times (via Twitter) that Purifoy did not pass his physical. Seattle still has an open roster spot as a result.
FRIDAY, 8:25pm: A day after he was unexpectedly cut by the Colts, defensive back Loucheiz Purifoy has been claimed off waivers by the Seahawks, per Adam Caplan of ESPN.com (Twitter link). Bob Condotta of the Seattle Times tweets that the team placed linebacker Kevin Pierre-Louis on the injured reserve list to create an opening on the 53-man roster for Purifoy.
Purifoy, who will turn 22 in December, signed with the Colts in May as an undrafted free agent out of Florida, and had been a regular contributor on special teams for the club for most of the season. His release on Thanksgiving came as something of a surprise, leading to speculation that it was a non-football decision. However, presumably the Seahawks did their homework on the rookie defensive back and were comfortable bringing him aboard.
As for Pierre-Louis, the 2014 fourth-rounder played sparingly for the Seahawks this season, and had been sidelined since Week 11 with a shoulder injury. The move to IR ends his rookie year, but he remains under team control for several more years.