Trent Williams, right, works on a drill with rookie tackle Morgan Moses, left, during this summer’ s OTAs. (John McDonnell/The Washington Post)

One thing was clear on the first day of training camp: It figures to be a long time before rookie right tackle Morgan Moses will be ready to contribute. Redskins officials hope the third-round pick from Virginia eventually will replace staring right tackle Tyler Polumbus, but Moses has no idea what he’s doing out there.

During Thursday’s first session, Moses, instead of getting to his spot and finishing his blocks, was too indecisive on running plays. He often seemed equally uncertain in pass protection.

No rookie is expected to be a finished product on the first day of camp. And Moses could benefit from one-on-one tutoring sessions with offensive line coach Chris Foerster. Many of Moses’s problems, though, have been apparent throughout the team’s offseason program.

Technique issues — such as playing too high in pass protection and poor timing on stretch-zone runs — can be addressed through repetition. But Moses won’t move forward until he fully grasps his responsibilities in the Redskins’ line philosophy.

Bottom line: Polumbus remains the Redskins’ best right tackle, by far. And he figures to be for the foreseeable future. Although that last sentence may scare Redskins fans, it really shouldn’t.

Compared to all of the NFL’s other starting right tackles, is Columbus the best? No. But Polumbus would would start for a bunch of teams in the league, NFL assistant coaches have told me. The Redskins could do worse than Polumbus — and they likely will if something happens to him.

The Post Sports Live crew looks at the biggest story lines ahead of Redskins training camp, from the struggling secondary to keeping all of the offensive stars happy. (Post Sports Live/The Washington Post)

More from The Post:

Changes on the Redskins beat

Training camp guide.

Gruden eager to put his stamp on the team

Reid: Gruden’s top job is to fix Griffin

Cornerbacks Crawford, Porter cleared to practice

Hatcher, three others open camp on PUP list

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