The Redskins have signed WR D.J. Hackett and DL Michael Marquardt and have waived/injured WR Roydell Williams.

Hackett spent last season with the Panthers and four seasons with the Seahawks under Jim Zorn, who was the team’s QB coach at the time. He will battle with rookie Marko Mitchell, third-year WR Marques Hagans and others for a roster spot.

Marquardt spent last season on the Eagles’ practice squad.

Williams joined the team in May. He suffered a broken pinkie on Sunday and likely will be rehabbing it for 4-6 weeks.