Walker (6-4, 271) originally signed with the Seattle Seahawks as an undrafted free agent in July 2009. He was released by the Seahawks on September 14 and was signed to their practice squad the next day. Walker spent eight weeks on the practice squad before being signed to the Seahawks active roster on November 10, where he was inactive Weeks 10-15. He was released by the Seahawks on December 26.
Walker, a 23-year-old native of Glendale Heights, IL, played collegiately at Illinois, where he was named honorable mention All-Big 10 his senior season.Smith, who was signed by the 49ers on November 3, 2009, played in three games, recording two tackles on defense and five special teams tackles.