Left guard Kory Lichtensteiger has agreed to a five-year deal.
(Toni L. Sandys/The Washington Post).

The Washington Redskins have a deal in place to retain the services of starting left guard Kory Lichtensteiger, who was set to become an unrestricted free agent at 4 p.m. Tuesday.

Lichtensteiger announced the news of the agreement via Twitter, saying “Just wanted to let Redskin Nation know I am going to be around for a while. Just agreed to terms on a deal!!”

A person with knowledge of the situation said that the contract, which still needs to be signed, is for a five-year deal. Financial terms weren’t immediately known.

Lichtensteiger is the first of Washington’s 13 unrestricted free agents to come to terms on a deal. The team on Saturday also re-signed restricted free agents Logan Paulsen, Darrel Young and had agreed to terms with outside linebacker Rob Jackson. Washington also had resumed talks with the representatives of special teams captain/linebacker Lorenzo Alexander, but a deal hadn’t been reached yet.

By re-signing Lichtensteiger, a fourth-year pro, Washington will ensure that at least four of its five starting linemen from last season will remain in place. Right tackle Tyler Polumbus is about to become a free agent, but had yet to work out an agreement yet, a person with knowledge of the situation said.

Lichtensteiger is valued greatly by Redskins Coach Mike Shanahan, who often describes him as his best run blocker. The 6-foot-2, 284-pounder also has the ability to play center, something else Washington’s coaches appreciate. Shanahan drafted Lichtensteiger in the fourth round out of Bowling Green State in 2008. Washington claimed him off of waivers in September of 2009 — the year before Shanahan took over as head coach.

In the 2010 season, Lichtensteiger replaced veteran Derrick Dockery in the starting lineup. He returned as a starter in 2011, but that season was cut short in Week 6 when Lichtensteiger tore the medial collateral and anterior cruciate ligaments in his right knee. He made a full recovery to start all 16 games for Washington in 2012, and was the winner of his team’s Ed Block Courage award.

— Mark Maske contributed to this report.