Wicker will have a short run at making an impression on the Redskins' coaching staff with just over a week remaining before roster cuts. Practice this week and Thursday's preseason game against the Ravens will be his only two opportunities to do so.
Wicker was waived by the Lions on Thursday.
Wicker was waived to make room for Eli Harold, who Detroit acquired via trade with San Francisco. Wicker will become a free agent if he clears waivers, and the undrafted-rookie out of Arizona State will continue to fight for a reserve defensive line and special teams role with another team in 2018.