SANTA CLARA, Calif. -- Last year, simply making the San Francisco 49ers' roster was a significant accomplishment for Darryl Morris.This year, the goal is to get on the field for significant playing time on defense.The undrafted rookie cornerback went from the practice squad to the 53-man roster to being a big part of the special teams as a rookie. Now, Morris is trying to take the next step: Being a nickel cornerback.Morris is getting practice time in the slot.