Fourth-round pick Chris Harper was signed to the San Francisco 49ers 53-man roster from the practice squad of the division rival Seattle Seahawks on Monday.
Harper, a wide receiver from Kansas State, was released by Seattle but re-signed to the Seahawks' eight-man practice squad on Sunday.
San Francisco, with five wide receivers on their roster and minimal game experience, took a chance that Harper will be able to contribute along with rookie Quinton Patton behind Anquan Boldin and Kyle Williams.
Harper had four receptions in preseason but dropped passes were an issue.
The team's 2012 leading receiver, Michael Crabtree, is expected to miss at least the first eight games recovering from a torn Achilles. Mario Manningham, a free-agent acquisition prior to last season, is recovering from a knee injury and joined Crabtree on the physically unable to perform list to begin the 2013 season.
The 49ers traded for Jonathan Baldwin in August and acquired Boldin in a trade with the Baltimore Ravens. The Baldwin deal included 2012 first-round pick A.J. Jenkins being shipped to the Kansas City Chiefs.