A year ago at this time, Colin Kaepernick was backing up Alex Smith, getting his reps in training camp and in exhibition games and biding his time as the 49ers' quarterback-in-waiting.Now the third-year pro is among the preseason favorites for the National Football League's MVP award.Mike Sando, who covers the NFC West for ESPN.com, noted that Kaepernick is tied with Drew Brees as the No. 3 favorite to be the league's MVP in 2013 at odds of 10-1, behind only Peyton Manning and Aaron Rodgers, according to Las Vegas oddsmakers Bovada.lv.Not bad, considering Kaepernick has started just seven regular-season games.Yet though the sample size is small, his impact has been enormous. Kaepernick goes into this season as the unquestioned starter and one of the most dynamic players in the NFL based on his second-half performance last season that also included three postseason games, including the Super Bowl.As Sando wrote, Kaepernick is a viable choice based on what everybody saw him do for the Niners offense last season, and his projected stats."His pace through 10 starts last season (three in the playoffs) would project to better than 3,800 yards passing and 800 yards rushing over a 16-game...