Associated Press

Smith underwent knee surgery that shelved him for the last eight games of 2008. He will help replace starting running back Larry Johnson, who was suspended for one game for conduct detrimental to the team.

Since being drafted in the fifth round in 2007, Smith has appeared in 23 games and gained 507 yards on 147 carries.

Also Saturday, the Chiefs released wide receiver Bobby Engram. He played in five games, catching five passes for 61 yards.