Washington is expected to place Thomas (knee) on injured reserve later this week, Nicki Jhabvala of The Washington Post reports.
Though the tight end reportedly received better results than expected after recently undergoing an MRI on the left knee he injured in Sunday's win over the Raiders, he's apparently still dealing with a serious enough of an injury to result on him landing on IR for a second time, which will end his season. Ricky Seals-Jones (hip) has been sidelined for three straight games with an injury of his own, but if available this weekend against the Cowboys, he would likely replace Thomas as Washington's starting tight end.