SANTA CLARA, Calif. -- Alex Smith's Kansas City Chiefs are 5-0. Colin Kaepernick's San Francisco 49ers are 3-2.Smith is a fine fit for Andy Reid's offense. He is playing his typical game-managing ways and helping the Chiefs stay perfect. Kaepernick's numbers are down this year from his spectacular 2012 run that culminated in a Super Bowl appearance. He is clearly suffering from injuries to receivers Michael Crabtree and Mario Manningham, but he has been far from horrible.