Philadelphia Eagles starting linebacker T.J. Edwards and safety Rudy Ford were placed on injured reserve, the team announced Thursday.

Both players sustained hamstring injuries in the Eagles’ 25-20 victory over San Francisco on Sunday night. They will not be available for at least the next three games as a result of the move.

Edwards, 24, has recorded 15 tackles and a forced fumble while starting all four games this season.

Edwards has 45 tackles and a forced fumble in 20 career games with the Eagles (1-2-1), who likely will turn to Alex Singleton to take his spot in the lineup on Sunday (1 p.m. ET) against the host Pittsburgh Steelers (3-0).

Singleton, who is a former CFL Most Outstanding Defensive Player winner, returned an interception for a touchdown in the win over the 49ers.

Ford, 25, has made five tackles while competing on special teams in three games this season.