A weekly examination of the San Francisco 49ers' quarterback play:Rewind: It's pretty simple. Colin Kaepernick probably had his worst performance of his 12-game NFL starting career in a 29-3 loss at Seattle on Sunday. He couldn't get anything going against the Seahawks' defense. Kaepernick threw for 127 yards and committed four turnovers; his quarterback rating was 14.0, the lowest of his career. Kaepernick said the 49ers will have no chance to win if he plays that way in the future.