Walker, Dallas (TE)
The San Diego Chargers have signed tight end Dallas Walker to a three-year contract.
Walker played for Western Michigan University from 2009-2011. He was out of football last season.
Brown, Cornelius (CB)
The Chargers agreed to terms on a one-year deal with Brown on Monday.
Brown spent time with the Chicago Bears and Indianapolis Colts. He played in 10 games with the Colts in 2010.
DePalma, Dan (WR)
The Chargers agreed to terms on a two-year deal with DePalma on Monday.
DePalma spent time on the Giants' practice squad in each of the last two seasons.
Butler, Deon (WR)
The Chargers agreed to terms with Butler on a one-year deal on Monday.
Butler played in 35 games during four seasons with the Seattle Seahawks, catching 57 passes for 611 yards (10.7 average) and four touchdowns.
Ohrnberger, Rich (G)
The San Diego Chargers signed Ohrnberger, the former Arizona Cardinals guard, to a one-year contract Thursday.
He was drafted by New England in the fourth round in 2009 out of Penn State. He played in five games his first two seasons with the Patriots, seeing limited time at right guard and on special teams. Ohrnberger spent the 2011 season on injured reserve due to a head injury and was released in February 2012. He signed with Arizona and played in 13 games last year, making two starts. He suffered a knee injury on Dec. 9 and was placed on injured reserve.
Brown, Ronnie (RB)
The San Diego Chargers made deals with two running backs Friday, agreeing to a two-year contract with former New England Patriots Danny Woodhead and a one-year deal to bring back Brown.
Brown played in 14 games for the Bolts last season, starting one. He rushed for 220 yards on 46 carries and tied for second on the team with 49 receptions for 371 yards.
Woodhead, Danny (RB)
The San Diego Chargers have agreed to a two-year contract with former New England Patriots running back Danny Woodhead.
Woodhead is expected to complement Ryan Mathews, who's been plagued with injuries and a fumbling problem. Woodhead was New England's second-leading rusher with 301 yards and four touchdowns on 76 carries while catching 40 passes for 446 yards and three scores.
Cox, Derek (CB)
The San Diego Chargers agreed to terms on a four-year contract with Cox, who had 12 interceptions the last four years with Jacksonville. The deal reportedly is worth $20 million.
Cox, 26, had four picks in 12 games last year. He's expected to slide into the starting lineup. Both of San Diego's starting cornerbacks, Quentin Jammer and Antoine Cason, are expected to leave as unrestricted free agents.
Rinehart, Chad (G)
The San Diego Chargers have signed former Buffalo Bills guard Chad Rinehart to a one-year, $1.75 million contract.
Rinehart is being reunited with his former position coaches in Buffalo, Joe D'Alessandris and Andrew Dees. Rinehart was limited to seven games and two starts at right guard in 2012 due to an ankle injury that landed him on injured reserve on Nov. 2. Rinehart's agent, Leo Goeas, was a Chargers tackle from 1990-92.
Dunlap, King (T)
The San Diego Chargers agreed to terms with tight end John Phillips and Dunlap on the opening day of free agency.
Dunlap helps the team make up for the loss of right guard Louis Vasquez to the AFC West rival Denver Broncos.