Seattle elevated Mannion from its practice squad to the active roster for Monday's game versus the Eagles, Aaron Wilson of KPRC 2 Houston reports.
Mannion was elevated to the Seahawks' active roster Saturday, Tom Pelissero of NFL Network reports.
Mannion signed with Seattle's practice squad Friday, Brady Henderson of ESPN.com reports.
The Vikings released Mannion from the practice squad Tuesday.
Mannion was elevated from the practice squad to the active roster by the Vikings on Saturday.
Mannion signed with Minnesota's practice squad Wednesday, Craig Peters of the Vikings' official site reports.
The Seahawks signed Mannion to their practice squad Wednesday, Gregg Bell of The Tacoma News Tribune reports.
The Vikings released Mannion on Tuesday, Chris Tomasson of the St. Paul Pioneer Press reports.
Mannion got the start under center in place of Kirk Cousins (rest) in Sunday's preseason opener against the Raiders, going eight of 12 for 79 yards in the 26-20 loss.
Mannion and Kellen Mond will get a "50-50" split of reps in Sunday's preseason game against Las Vegas, the Minneapolis Star Tribune reports.