Pierre Garcon will miss tonight’s game with a mild hamstring strain. (Alex Brandon/Associated Press)

The Redskins announced that starting wide receivers Pierre Garcon and DeSean Jackson will indeed miss the preseason opener with injuries. Coach Jay Gruden had ruled Garcon out on Wednesday, and listed Jackson as questionable.

Garcon has a mild hamstring strain and Jackson a sprained ankle.

Safeties Ryan Clark and Phillip Thomas also will miss the game with hamstring strains, as Gruden had said.

The Redskins also will be without cornerback Tracy Porter, tight end Mike Caussin and center Mike McGlynn.

McGlynn, Porter and Caussin hadn’t missed time with injuries, and the team didn’t release the reasons for their inactivity.

Santana Moss will start in place of Garcon, and Andre Roberts in place of Jackson.

Bacarri Rambo will start at free safety for Clark.

Have a Redskins question? Send an e-mail to mike.jones@washpost.com with the subject line “Mailbag question,” and it might be answered on Tuesday in The Mailbag.

What’s ahead:

The Redskins and Patriots open the preseason tonight at 7:30 p.m. at FedEx Field. The game airs on NBC-4 and CSN, and there is an open thread for those who want to chat while they watch.

Also from The Post:

For young Redskins, Thursday night is a job fair

Five story lines to monitor tonight

Eight rules changes to watch

The Early Lead: An NFL preseason Week 1 primer

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