SANTA CLARA, Calif. -- The second quarter of the San Francisco 49ers' season is complete. Now let's look at some key developments as the defending NFC champions sit at 6-2:Story of the quarter: The perfect quarter. The 49ers went 4-0 in the second quarter of the season and have won five straight games. San Francisco has been dominant in all three phases of the game and have scored at least 31 points in each game during the streak. It is the first time they have done that since 1997.