Seattle elevated Thompson to its active roster ahead of Thursday night's game against the Cowboys, John Boyle of the Seahawks' official site reports.
The Seahawks signed Thompson to their practice squad Wednesday.
Thompson was waived by the Seahawks on Tuesday, John Boyle of the team's official site reports.
Thompson played three offensive snaps and wasn't targeted in Sunday's 20-10 win over the Cardinals.
Seattle signed Thompson from its practice squad to its 53-man roster Wednesday, Aaron Wilson of KPRC 2 Houston reports.
The Seahawks elevated Thompson to the active roster Saturday, Michael-Shawn Dugar of The Athletic reports.
Thompson reverted to the Seahawks' practice squad Tuesday, per the NFL's official transaction log.
Thompson was elevated from the practice squad ahead of Monday's game against the Giants, John Boyle of the Seahawks' official site reports.
Thompson agreed to join the Seahawks' practice squad Friday, Tim Weaver of USA Today reports.
Thompson wasn't targeted in Sunday's 30-13 loss to the Rams.