Rookie DB Philip Adams joined the Niners' punt-returner competition at training camp this week. Projected rookie starter Kyle Williams is out indefinitely with a sprained right big toe. Undrafted rookie LeRoy Vann was cut in the second week of training camp and his replacement, Bobby Guillory, has flubbed two punts in two exhibition games. San Francisco prefers Ted Ginn Jr. not to add punt returns to his plate of wide receiving and kick returning.