Ryan Kerrigan, shown here in the season opener against the Eagles, says the knee injury he suffered Sunday against the Lions won’t keep him off the field. (John McDonnell/The Washington Post)

Linebacker Ryan Kerrigan said he planned to participate fully in the Washington Redskins’ practice Wednesday after suffering a slight knee injury during Sunday’s loss to the Detroit Lions.

“I just banged it up a little bit,” Kerrigan said. “I’m feeling good today, though, and I’m expecting to fully practice.”

Kerrigan said the slight injury “happened toward the end of the game” but “wasn’t bad enough” to force him to leave the game.

Tight end Fred Davis said he hopes to be available to play Sunday at Oakland. Davis was on the Redskins’ inactive list for the defeat to the Lions after suffering a sprained right ankle on the final play of last Friday’s practice.

“I feel a lot better,” Davis said. “I think I’ll be able to play Sunday. So we’ll see how the week goes, pushing off and getting back into it, like running full-speed routes.”

Davis was on the field for pregame warmups Sunday but said: “I knew I wasn’t going to be able to [play].”

Davis isn’t the only Redskins tight end limited this week. Rookie Jordan Reed suffered a bruised thigh during the Detroit game.

Place kicker Kai Forbath said he’s hopeful of being available in Oakland but won’t know for certain until he tests his groin injury, potentially late in the week. Forbath has missed two straight games, with John Potter filling in at kicker and still on the roster this week.

“It’s hard to tell unless you kick a ball. …Until we actually give it a shot, you don’t really know,” Forbath said.

Have a Redskins question? E-mail Mike Jones at mike.jones@washpost.com with the subject line “Mailbag question” for him to answer it in The Mailbag on Tuesday.

What’s ahead:

● Mike Shanahan and Robert Griffin III speak with reporters following Wednesday’s practice.

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