SANTA CLARA, Calif. -- Anthony Dixon started to practice kick returning in the fifth week of the season.He may practice it even more now.With no kick returning experience in his life, Dixon returned a kick 47 yards against Jacksonville on Oct. 27. Dixon took over for Kyle Williams, who struggled as a kick and punt returner in the game.It is not out of the question to think Dixon could be the primary kick returner and LaMichael James could return punts Sunday against Carolina as the 49ers return from their bye.