One day after the NFL Draft concluded, the Redskins continued to add rookies--this time the undrafted variety.

The Redskins agreed to contract terms with 13 undrafted rookie free agents, the team announced on Monday.

The group of Redskins prospects includes four offensive linemen, two defensive ends, two safeties and a quarterback.

They join 10 rookies the team drafted in the NFL Draft on April 26-27.

Here is the complete list:

Shannon Boatman is a 6-5, 315-pound offensive right tackle. He also played some guard for Florida State, so he has some versatility. He started two years and is thought to be a good developmental prospect. Boatman was diagnosed with Type 1 diabetes at age 17, but he has been able to keep the disease in check.

Offensive lineman Kerry Brown is a 6-5, 305-pound guard from Appalachian State. He started four years and was a Division I-AA All-American. He is regarded as a tough, physical lineman who needs to fine-tune his technique.

Devin Clark is a 6-3, 305-pound offensive right tackle from New Mexico. He is expected to move inside to guard at the pro level, though. He participated in national Olympic-style weightlifting competitions, so he is a strong, stout player. He may have been bypassed in the draft due to recent ankle surgery.

Kyle DeVan played mostly center at Oregon State. He was a three-year starter and registered 232 knock-down blocks overall. He stands at 6-2 and 300 pounds.

Defensive end Alonzo Dotson is 6-4 and 260 pounds. He played in 14 games with Redskins second round draft pick Malcolm Kelly last year and recorded 20 tackles and two sacks. His father Santana played for the Green Bay Packers in the 1990s and his grandfather Alphonse played for John Madden's Oakland Raiders in the 1970s.

Horace Gant is a 6-3, 218-pound wide receiver who holds St. Olaf school records for receptions with 185, receiving yards with 3,061 and touchdowns with 27. Gant was coached by new Redskins offensive assistant Chris Meidt, who held the head coaching position at St. Olaf last year.

Curtis Gatewood is a 6-2, 248-pound outside linebacker who will likely play either the strong-side or defensive end in the pros. A four-year starter at Vanderbilt, he recorded 110 tackles, 10.5 sacks and one interception in his college career.

Quarterback Bret Meyer joins the Redskins as one of five QBs on the off-season roster. He is expected to compete with rookie draft pick Colt Brennan and first-year player Sam Hollenbach for a backup job. He completed 233-of-382 passes for nine touchdowns and 13 interceptions as a senior at Iowa State.

Safety Kevin Mitchell is a 6-0, 209-pounder who led the Big Ten in passes defended last year. He was tied for third in the Big Ten with five interceptions. He also logged 75 tackles and 11 pass deflections. Mitchell is not related to the late Redskins linebacker Kevin Mitchell.

Matteral Richardson is 5-11, 194 pounds and regarded as physical cornerback and sound tackler. He started three years at Arkansas, finishing with 180 tackles, 27 pass break-ups and four interceptions. Nicknamed "Red," he should compete for a special teams job early on.

Safety Justin Scott was a two-year starter at Purdue. Last year, the 6-0, 209-pounder recorded 73 tackles, one sack and three interceptions.

Defensive end Dorian Smith played two years at Oregon State as a junior college transfer, but started just one season. The 6-1, 264-pounder recorded 72 tackles, 22 tackles for a loss and 15 sacks.

Bryan Wilson is a 6-3, 250-pound outside linebacker who earned 2007 All-MEAC first-team defense honors. He logged 50 tackles, a team-high seven sacks and a league-high six forced fumbles. Wilson hails from Temple Hills, Md. He attended the Redskins' local college workout.