Biggers is a versatile corner who can line up in the slot or on the outside, and can even play safety if need be. He spent last season with the Philadelphia Eagles and has also played for the Redskins and Buccaneers.
They're both earning the veteran minimum salary and have a fair amount of competition at their positions.
As it relates to Biggers, the Pats are set on the outside with Butler and Ryan, and will likely opt for Justin Coleman in the slot, but Biggers could push for a fourth cornerback spot.
Washington could be more of long shot to make the roster due to the Patriots' depth at receiver. Julian Edelman, Danny Amendola, Keshawn Martin, Aaron Dobson and Chris Hogan are all under contract, and the team is still looking to draft a receiver or two in the upcoming NFL Draft. However, if the speculation surrounding a possible release of Amendola holds any merit, that'd better Washington's chances of making the team.