The Chicago Bears' defense took some big hits Monday as the team reportedly learned Tuesday that linebacker Lamarr Houston suffered a torn ACL, defensive tackle Eddie Goldman incurred a high ankle sprain and linebacker Danny Trevathan suffered a thumb injury.

Houston is expected to miss the season, and Goldman is forecast to sit out four weeks. Trevathan's prognosis is unknown. All three were injured in the Bears' loss to the Philadelphia Eagles on Monday.

It's the second time in three years that Houston has suffered a torn ACL. He missed the final eight games of the 2014 season after injuring himself celebrating a sack in a loss to the New England Patriots.

Houston signed a five-year, $35 million contract with the Bears in 2014. He returned from the ACL injury last year to record a team-high eight sacks.

Goldman is the team's best interior defender, and Trevathan left the Denver Broncos to rejoin coach John Fox with the Bears this year.