The toughest guy on the 49ers' big, bad second-ranked defense might be one of their smallest. Now in his sixth NFL season, free safety Jimmie Ward has overcome an inordinate amount of injuries and insults to be in the position he was late Sunday afternoon at the Los Angeles Memorial Coliseum: Ward had back-to-back pass break-ups, the last on 4th-and-2, to seal the 20-7 win over the NFC champion Rams.