Luani was waived by the Chargers on Saturday.
Luani was signed to the active roster Saturday.
Luani signed his exclusive-rights free agent tender with the Seahawks on Monday, Josh Boyle of the team's official site reports.
Luani (quadriceps) was a full participant in Friday's practice, John Boyle of the Seahawks' official site reports.
Luani (quadriceps) is inactive for Sunday's game against the 49ers.
Luani signed a contract with the Seahawks on Saturday, Curtis Crabtree of Sports Radio 950 KJR Seattle reports.
The Seahawks waived Luani on Tuesday, Bob Condotta of The Seattle Times reports.
The Raiders traded Luani to the Seahawks on Saturday, Michael Gehlken of the Las Vegas Review-Journal reports.
Luani will start at strong safety for the Raiders during Sunday's game against the Bills, Scott Bair of NBCSportsBayArea.com reports.