SANTA CLARA, Calif. -- The San Francisco 49ers secondary is undergoing a major change as the team added several new players to the unit. At the 49ers' minicamp Wednesday, defensive coordinator Vic Fangio addressed some of them and what he expects.Let's take a look:On first-round pick Jimmie Ward who is expected to be the nickel cornerback: "He's going to certainly get every opportunity [to be the nickel]. But, he's missed all this time [with a foot injury] and he's learning and he's a rookie, etc.