Free agent defensive tackle Tom Johnson signed to a one-year, $2.1 million contract with the Seattle Seahawks, according to Tom Pelissero of NFL Network. The deal could be worth as much as $2.7 million with incentives. Johnson totaled 32 tackles and two sacks for the Vikings last season and now looks to replace Sheldon Richardson on Seattle's interior line. Outside of Richardson, who the team coincidently lost to Minnesota, Johnson is the only defensive tackle the Seahawks visited with during free agency. Signing him was the cost-friendly route considering they offered Richardson $6.5 million.