The New York Giants’ injured reserve list grew to 22 with linebacker Jacquian Williams and offensive lineman James Brewer ruled out of the final two games due to concussions.

Defensive tackle Dominique Hamilton was signed off the team’s practice squad, and offensive lineman Adam Gettis was signed off the Pittsburgh Steelers’ practice squad. The Giants also added defensive tackle Thomas Gordon to their practice squad.

Williams led the team with 75 tackles before suffering a concussion against the Seattle Seahawks on Nov. 9. The fourth-year pro started the first nine games at weak-side linebacker, but has missed the past five games.

Brewer was inactive for the first 10 games of the season, but made his season debut on Nov. 23 against Dallas before suffering his concussion the following week at Jacksonville. He has missed the past two games.

Hamilton entered the NFL as an undrafted rookie signed by Oakland in 2012. He has spent time with the Kansas City Chiefs and Washington Redskins, but has not appeared in a regular-season game.

Gettis was a fifth-round pick by the Redskins in 2012. He played in 13 games on special teams the following seasons, along with 17 snaps on offense. He has been on Pittsburgh’s practice squad since Oct. 15.

Gordon was signed by the Giants on May 12 as an undrafted rookie, and played in all five preseason games. He was waived Aug. 31.