Redskins outside linebacker Brian Orakpo has another pectoral injury. (Jonathan Newton/The Washington Post)

Linebacker Brian Orakpo is expected to miss the remainder of the season after learning that he indeed tore his right pectoral muscle in Sunday’s win over the Tennessee Titans, a person with knowledge of the situation confirmed.

Orakpo, a three-time pro bowler, left the game on the second play of the fourth quarter with what was originally described as a right shoulder injury.

After the game, Coach Jay Gruden said that the injury actually was to Orakpo’s right pectoral and described the damage as significant.

Orakpo had an MRI exam on the area Monday morning, and the team learned shortly after that he suffered a tear.

It’s the third such injury that the former first round pick has suffered in his six-year career.

Orakpo tore the left pectoral muscle at the end of the 2011 season, and then tore the same muscle two games into the 2012 campaign.

He recorded 10 sacks last season, and was set to become a free agent. But Washington retained his services by using the franchise tag on him, paying him a one year, guaranteed salary of $11.45 million.

The linebacker had struggled this season, recording only half a sack in seven games while playing with a dislocated middle finger on his left hand and a sprained ankle.

Rookie Trent Murphy, a second round pick out of Stanford, will likely take over at right outside linebacker.

E-mail a Redskins question to, with the subject line “Mailbag question,” and it might be answered in Tuesday’s Mailbag.

More from The Post:

Wise: Resist the temptation to bring Griffin back too soon

Mike Jones’s five observations from Redskins’ win over Titans

D.C. Sports Bog: Cooley says start McCoy | Cousins hanging his head

Fancy Stats: Here’s when Cousins lost the fan base

More NFL: Home page | Sports Bog | Early Lead | Fancy Stats | Fantasy

Follow: @MikeJonesWaPo | @lizclarketweet | @JReidPost | @Insider