Rookie tackle Morgan Moses, here during Day 13 of Redskins training camp. (John McDonnell/The Washington Post)

RICHMOND — Rookie offensive tackle Morgan Moses doesn’t know how much work the Redskins’ second team will get in Thursday’s preseason opener against the New England Patriots. He’s not even sure whether he’ll line up at right tackle, as he did during most of spring workouts, or at left, as he has during most of training camp.

But the 6-foot-6, 318-pound Virginia standout hopes to establish his reliability in the eyes of Coach Jay Gruden and offensive line coach Chris Foerster at whatever role he’s asked to play.

“I’m comfortable with both,” Moses said after the Redskins wrapped up their three-day joint practice against the Patriots. “Being able to have a little bit of both under my belt is a good thing.”

And while the footwork and hand placement differs, Moses said he tries to attack defenders the same way.

Like many of his teammates, Moses says he welcomed this week’s joint practices against New England, which served as both a mental break and new test against a genuine opponent. But the most beneficial thing about the last two weeks, he said, has been honing his craft behind Pro Bowl left guard Trent Williams.

“Being able to work behind him, you learn all sorts of things — different tricks and techniques,” Moses said. “Going into practice every day, he’ll tell me to work on one little thing, that has definitely helped me.”

Thursday’s game will be Moses’s first time in FedEx Stadium, but he doesn’t expect nerves to be a factor in his play.

Have a Redskins question? Send an e-mail to 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 Thursday at 7:30 p.m. at FedEx Field. The game airs on NBC-4 and CSN, and The Insider will host an open thread for those who want to chat while they watch.

Also from The Post:

Biggers happy to take on any role in the secondary

Garcon, Clark and Thomas won’t play Thursday | Gruden’s simple expectations

Rambo still trying to find his way | Jackson leaves practice with an ankle injury

Davis using experience as grad assistant to impress coaches

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