The team also confirmed that Reed Doughty is on injured reserve.
Zorn said the Redskins worked out four punters: Josh Miller, Ryan Plackemeier and two younger players he did not name.
Green, 31, played last year with Seattle but started his career in Chicago. He played for current Redskins defensive coordinator Greg Blache with the Bears. Green has 325 tackles in 96 games. Zorn also confirmed the presence of running back Shaun Alexander today at Redskin Park for a workout.