In his first season as an NFL quarterback, Colin Kaepernick took the 49ers to the Super Bowl.In his second season, he came within 18 yards of returning the Niners to the NFL's biggest game.Yet Kaepernick's mistakes in the fourth quarter of Sunday's NFC Championship Game at Seattle's CenturyLink Field are what will be remembered this offseason. His two interceptions and a lost fumble proved costly in the 23-17 loss to the 49ers' biggest rivals."I didn't play good enough to win," Kaepernick told reporters Sunday night. "I turned the ball over three times. I cost us this game."In going for the victory from the Seattle 18 with 30 seconds to play, Kaepernick tried to throw a fade route to receiver Michael Crabtree in the back right corner of the end zone. But Seattle corner Richard Sherman played it well, leaping to tip the ball away from Crabtree and back into the hands of his teammate Malcolm Smith.Just like that, the 49ers' eight-game winning streak and run toward a second consecutive NFC championship was over.If Kaepernick's ball had been just a few inches higher, it likely would have fallen into Crabtree's arms. But we'll never know."I could've put it a little deeper in the corner...