Jeremy Kimbrough tries to make a play on Jawan Jamison early in training camp. (John McDonnell/The Washington Post) Jawan Jamison, left, during training camp. (John McDonnell/The Washington Post)

The Washington Redskins announced that they have promoted rookie running back Jawan Jamison to the 53-man roster to fill the spot vacated by third-year pro Evan Royster, who suffered a season-ending high-ankle sprain.

The Redskins drafted the 5-foot-7, 203-pound Jamison in the seventh round of last April’s draft. The Rutgers product rushed for 1,972 yards and 13 touchdowns on 486 carries from 2010-12.

The Redskins also signed running back Miguel Maysonet to their practice squad on Tuesday. Maysonet, who played college ball for Stony Brook,  had had brief stints with the Eagles, Browns, Chargers, Colts and Jets.

Royster suffered the high-ankle sprain in Sunday’s game against Kansas City. He doesn’t need surgery, but it will take more than three weeks for the injury to heal, and so the team has placed him on injured reserve

Have a Redskins question? E-mail Mike Jones at with the subject line “Mailbag question” for him to answer it in The Mailbag on Tuesdays.

What’s ahead:

●  Wednesday’s practice is at 11:50 p.m. Coach Mike Shanahan and quarterback Robert Griffin III are expected to meet with reporters in the afternoon.

More from The Post:

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Mailbag: Shanahan, Snyder and what’s to come

Shanahan speaks to Snyder, but no resolution | Bench Griffin?

Reid: Hire a true GM now | Hamilton: Problems start at the top

Wise: There’s one way Snyder can make Redskins fans happy

D.C. Sports Bog: 23 ways to force Snyder’s hand | Cooley on the mayhemMore

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