In 2012, the 49ers were predicted to be the NFC West champions and possibly make a run for the Super Bowl. Starting the season 6–2, the 49ers went on to face the rival St. Louis Rams in Week 10. Alex Smith suffered a concussion in the second quarter and exited the game. He was replaced by 2011 second-round pick Colin Kaepernick, who led the 49ers back to tie the game. The next week, Kaepernick and the 49ers blew out the Chicago Bears 32–7, and Harbaugh chose Kaepernick as the starter next week against the New Orleans Saints, despite Smith being cleared to play. A quarterback controversy began. Despite Smith leading the NFL in completion percentage (70%) and passer rating (104.1), Kaepernick was considered more dynamic with his scrambling ability and arm strength. Kaepernick eventually started the rest of the season, going 5–2. Kaepernick set the record for rushing yards for a quarterback in the playoffs with 181 rushing yds against the Green Bay Packers. The 49ers defeated the Packers and Atlanta Falcons in the playoffs and advanced to Super Bowl XLVII, but were denied their sixth Super Bowl win against the Baltimore Ravens, who were coached by John Harbaugh, 34–31.