SANTA CLARA, Calif. -- The San Francisco 49ers' special teams unit has been improved all season.The coverage units have been outstanding.However, what may be most satisfying to the unit is the return team is starting to make a splash. After struggling early in the season, the 49ers are seeing success on returns. LaMichael James has produced long kick returns in the fourth quarter to help the 49ers win."That's what's exciting to us," said 49ers' special teams ace Bubba Ventrone.