NASHVILLE, Tenn. -- Observed in the locker room after the San Francisco 49ers' 31-17 win over the Tennessee Titans:Read-option returns: 49ers quarterback Colin Kaepernick had 68 yards on 11 carries using the read-option offense. It was the most the 49ers used it this season. Kaepernick said it was because the Titans gave the 49ers opportunities to use it.Praise for Morris: Rookie cornerback Darryl Morris has been one of several young 49ers who have played well.