Tukuafu signed a contract with the Seahawks on Tuesday, Curtis Crabtree of Sports Radio KJR reports.
Tukuafu has played for the Seahawks the past two seasons, and the team ultimately decided to bring him back as they parted ways with Tani Tupou. Tukuafu figures to play in Sunday's game against the Rams as the lead blocker for Thomas Rawls.