The deal is expected to become official Wednesday, when free agents can begin signing with teams.
This couldn't possibly be a better fit for both Richardson and the Redskins. With the departures of veterans DeSean Jackson and Pierre Garcon past year, they simply didn't get enough production out of that position group.
The news was first reported by NFL Network. Richardson set career-highs across the board last season and will likely compete with Josh Doctson for targets behind Jamison Crowder in an underrated Washington pass-catching group that also includes Chris Thompson and Jordan Reed. He had a big breakout year in 2017 as he had 44 catches for 703 yards and six touchdowns in 16 games (13 starts).
Richardson was a second-round selection in the 2014 draft by the Seahawks. He returned in Week 10, only to suffer a season-ending hamstring injury while hauling in a 40-yard reception in his first game back.