Seeking to add to their pass rush after putting Cliff Avril on Injured Reserve last week, the Seahawks on Tuesday night agreed to terms on a contract with veteran defensive end and likely future Hall of Famer Dwight Freeney. The Seahawks had not filled Avril’s spot on the 53-man roster leaving an opening for Freeney, who agreed to terms after a visit, workout and physical with the Seahawks on Tuesday afternoon. Freeney broke the news that he was becoming a Seahawk on Twitter Tuesday night stating: “Time to get loud, 12s.” The team later confirmed that Freeney had agreed to a one-year contract. He is expected to practice for the first time with the Seahawks on Wednesday with the intention of making his debut when Seattle hosts Houston on Sunday. Freeney, 37, has been a free agent since the end of last season, which he played with Atlanta on a one-year deal. He had three sacks in 15 games in playing more of a complementary role for the Falcons — he logged 415 snaps, or 37.5 percent — and also had sack in the Super Bowl loss to the Patriots. Freeney, a seven-time Pro Bowl selection, is 18th on the NFL’s all-time sacks list with 122.5, which is second among active players behind only Julius Peppers of Carolina, who has 150. Seattle quarterback Russell Wilson tweeted a welcome to Freeney Tuesday night, stating: “Excited to have my homie @DwightFreeney join the squad! #SackKing.” Avril, the team’s leader in sacks last year with 11.5 when he also made his first Pro Bowl, is out until at least a Dec. 17 game against the Rams as he continues to see doctors to determine what caused numbness in his arms and hands when he was kicked in the chin by Indianapolis QB Jacoby Brissett when he dove to make a tackle in a game against the Colts on Oct. 1.