The Dallas Cowboys suffered a horrendous 26-15 loss to the Buffalo Bills on Thanksgiving Day, and they lost a key piece of their offensive line in the process.

At his press conference on Friday, Cowboys head coach Jason Garrett announced that left guard Connor Williams suffered a torn ACL in the defeat and that he will undergo surgery sometime within the next two-to-four weeks with the hope that he will be ready at some point next season, per Josh Alper of ProFootballTalk.

This marks the second time Williams has dealt with knee issues in 2019, as he underwent arthroscopic surgery earlier in the season and missed one game as a result.

Xavier Su'a-Filo started in place of Williams during the contest he missed earlier in the year and replaced him on Thanksgiving following the injury, so it seems safe to assume that he will man the starting left guard spot moving forward.

The good news for the Cowboys is that Su'a-Filo has some experience as a starter with the club, as he started eight games last season and played a key role in Dallas winning 10 games, capturing the NFC East division title and advancing to the Divisional Round of the playoffs.

Still, losing Williams obviously stings.

The 22-year-old, who played his collegiate football at the University of Texas, was originally selected by the Cowboys in the second round (50th pick overall) of the 2018 NFL Draft.

He started 10 of the 13 games he played during his rookie campaign.

Dallas fell to 6-6 with the loss to the Bills and has gone just 3-6 since its 3-0 start.