Harrison is active for Sunday's game against the Bears.
The Packers claimed Harrison off waivers from the Seahawks on Wednesday, Rob Demovsky of ESPN.com reports.
Harrison was waived by the Seahawks on Monday, Bob Condotta of The Seattle Times reports.
Seattle is expected to cut Harrison next week after the defensive tackle requested to be released by the team Saturday, Tom Pelissero of NFL Network reports.
Harrison (ankle/knee) was clear of Thursday's injury report after being a limited participant during Wednesday's practice, John Boyle of the Seahawks' official site reports.
Harrison was signed to Seattle's active roster Monday, Logan Reardon of the team's official site reports.
The Seahawks activated Harrison from the practice squad Thursday, Jordan Duncan of the team's official site reports.
Coach Pete Carroll said Harrison will be elevated to the active roster for Sunday's game against the Rams if Bryan Mone (ankle) is ruled out, Bob Condotta of The Seattle Times reports.
Coach Pete Carroll notes that Harrison "needed a little time to get in football shape" upon joining the Seahawks' practice squad Oct. 7, Bob Condotta of The Seattle Times reports.
Seattle signed Harrison to the practice squad Wednesday, Adam Schefter of ESPN reports.