Per Jason La Canfora's Redskins Insider Blog. Marcus Washington has a hurt knee: "For him to miss a practive means he is pretty beat up." - La Canfora. Could mean a start for Rocky McIntosh, which would be his first. Rocky has seen some field in the past few weeks but has not produced much in the way of defensive statistics.
MLB Lemar Marshall also sat out practice with a knee, as did O-linemen Casey Rabach and Jon Jansen. Remember that Casey Rabach played last game with a cast after surgery on his broken hand. Todd Wade played for Jansen last week and did an encouraging job in that role. He's a solid backup. Marshall, Rabach, and Jansen are all probable for the Rams' game.
Go thank Jason La Canfora for updating us on practice notes, as he's actually around the players whereas I'm just jockeying my keyboard.