Alfonso Smith has been signed by the 49ers, according to his own twitter account.

Smith has been signed by the 49ers, according to his own twitter account.

Analysis:

With Kendall Hunter (torn ACL) out for the season, San Francisco needs additional depth at running back. Smith faces an uphill battle to make the roster, as the 49ers already have Frank Gore, Carlos Hyde, Marcus Lattimore (knee/hamstring), and LaMichael James (elbow). Smith played for the Cardinals from 2011 to 2013, recording 156 rushing yards on 38 carries (3.3 YPC), with another 110 yards on 15 receptions.