Players might have had Sunday off but team officials were hard at work, locking down a starting right tackle and adding some competition at the running back spot.

The Redskins will turn to a familiar face to play right tackle, agreeing to terms Sunday to re-sign Jammal Brown to a five-year deal.

Meanwhile, the team announced that it has acquired running back Tim Hightower from the Arizona Cardinals in exchange for veteran defensive end Vonnie Holliday and an undisclosed draft pick. The pick will be a conditional late-round pick that will be determined by Hightower's playing time, according to ESPN.

Hightower, 25, should instantly challenge Ryan Torain for the Redskins' starting running back job. He started for the Cardinals each of the past two seasons. Hightower, the Cardinals' fifth-round draft pick in 2008, had 736 yards and five touchdowns on the ground last year, averaging 4.8 yards per carry.

Holliday is a 13-year veteran who appeared in 15 games for the Redskins last season, starting in two. He contributed primarily in nickel situations. He became somewhat of a public face for the team during the lockout when he represented his Washington teammates in labor negotiations between the players and NFL owners.

The re-signing of Brown is important move because it means the Redskins might have all of their starting positions now accounted for. They opened training camp last week with a gaping hole at right tackle. The Redskins acquired Brown prior to the 2010 season in a trade with New Orleans and the two-time Pro Bowler started 14 games last season.

Brown prefers playing on the left side and entered free agency to see what opportunities might exist there, but he apparently decided his best chance at playing time was to return to Washington.

If he plays out even half of his contract, the Redskins might not have to worry about either tackle position for a couple of seasons, as Trent Williams was drafted just last year to protect the quarterback's blind side.