Cleveland, OH. (PFCritics) -- The Cleveland Browns signed four more draft picks on Sunday, leaving only one pick unsigned. The Browns signed D'Qwell Jackson, Leon Williams, Isaac Sowells, and Jerome Harrison.

Jackson, a second-round draft linebacker from Maryland, was the Atlantic Coast Conference's defensive player of the year last year. Williams will challenge for one of the Browns starting inside linebacker positions.

Williams, a fourth-round linebacker, will try to win a spot as a backup linebacker this year. Sowells, the Browns other fourth-round draft pick, is an offensive lineman. He started 27 games at left tackle in college, but is expected to be a backup guard for the Browns. Harrison, a fifth-round draft pick from Washington State, will compete for the third-down back job on the Browns roster.

The only draft pick not to sign yet is third-round receiver Travis Wilson.