The Washington Redskins are planning on bringing in three veteran running backs for tryouts according to NFL.com: Adrian Peterson, Jamaal Charles, and Orleans Darkwa. All three have remained free agents throughout the offseason but are looking to continue playing.

The need for running back depth started when rookie second-round pick Derrius Guice was lost for the season [VIDEO] after the first preseason game with a torn ACL. According to Hogs Haven of SB Nation, Guice will have ACL surgery with renowned surgeon Dr. James Andrews soon.

Then Washington saw two more running backs, second-year player Samaje Perine and third-year player Byron Marshall, both leave the team's second preseason game with ankle injuries.

So the Redskins need more able bodies at running back to go along with Rob Kelley and Chris Thompson.

Adrian Peterson

33-year-old Peterson started last season with the New Orleans Saints. After playing four games with them, he was traded to the Arizona Cardinals.

With the two teams, he carried the ball 156 times for 529 yards and two touchdowns. Vintage Peterson was seen at times as he had games of 134 and 159 rushing yards with Arizona. He missed the last five games of the season though, with a neck injury, and was released by the Cardinals in March.

The 2012 MVP currently sits tied for ninth all-time with 99 rushing touchdowns and 12th with 12,276 rushing yards. His 2,097 rushing yards in the 2012 season were just eight shy of tying the single-season record set by Eric Dickerson in 1984.

Jamaal Charles

Charles spent last season toting the ball for the Denver Broncos. The 31-year-old carried the ball 69 times for 296 yards and one touchdown. He played in just eight total games for the Kansas City Chiefs in the two seasons of 2015-16 as he tore his ACL and then had a meniscus tear.

The four-time Pro Bowler has rushed for over 1,000 yards five times, most recently in 2014. For his career, Charles has 7,556 rushing yards and 44 rushing touchdowns.

Orleans Darkwa

Darkwa saw extensive playing time for the first time in his career for the New York Giants last season. He ended the year with 171 rushing attempts for 751 yards and five touchdowns. He rushed for a career-high 154 yards in the last game of the season against the Redskins.

The 26-year-old entered last season with just 75 carries for 287 yards and four touchdowns over three seasons. Darkwa never had more than 12 rushing attempts in a game, a total he surpassed six times last season.