Butler (knee) was placed on injured reserve Monday.
Butler tore his ACL during the Cowboys' Thanksgiving Day win over the Giants and will be out for the rest of the season, Patrik Walker of the Cowboys' official site reports.
Butler tore his ACL during the Cowboys' 27-20 win over the Giants in Week 13 and was placed on injured reserve Wednesday, Josh Sanchez of SI.com reports.
Butler (knee) has been ruled out for the rest of Sunday's game against the Giants, Nick Harris of the Fort Worth Star-Telegram reports.
Butler recorded 12 tackles (10 solos) including a sack and added three passes defended in Sunday's win over the Commanders.