Washington Redskins coach Mike Shanahan said suspended players Fred Davis and Trent Williams will be back at team headquarters this week, and over the next couple of weeks, will be permitted to go through conditioning work with the team’s training staff even though neither is allowed to play again this season.

Both Davis and Williams are in the middle of four-game suspensions for violating the league’s substance abuse policy. They tested positive for marijuana use multiple times this season.

Davis, a tight end, was Washington’s leading pass-catcher with a career-high 59 catches for 796 yards and three touchdowns. He is due to become an unrestricted free agent this offseason. Williams – selected fourth overall out of Oklahoma in 2010 – is Washington’s top offensive lineman.

League rules permit Davis and Williams to be at the facility and go through football-related activities, although they can’t play. But Shanahan has decided that both players’ activities will be limited to strength and conditioning work. Shanahan had strength coach Ray Wright inform Davis and Williams of the terms of their access.

“We’re going to have them come in here over the next couple of weeks, get some good workouts in,” said Shanahan, whose team has only two games remaining on the schedule. “We want to make sure they’re in shape. We’re not going to do anything football related, relative to meetings. … More so conditioning the next couple weeks.”

Shanahan said Davis and Williams’s access will be similar to that of a player on injured reserve.

“When you have people on IR, people that get hurt, and you’re preparing for a game, it’s time consuming. Everybody’s focused. It’s really hard to get ready for a game when you’re not part of that gameplan. We’ll just make sure we work them pretty hard and get them in shape.”

Williams and Davis both addressed the team on Dec. 7, just before their suspensions began, and apologized for their actions. But since then neither has been at Redskins Park.