Alex Smith has a 2-25 career record as a starter when the San Francisco 49ers have allowed at least 24 points, while Colin Kaepernick is 3-1 in those games.

Smith was the 49ers' starter in a Week 3 loss when they allowed 24 points against the Vikings. Smith started a Week 2 loss last season against the Cowboys where the 49ers allowed 27 points, which was their highest points allowed total beyond a 34-27 Week 17 win against the Rams.

Smith also won last season's Divisional Playoff game against the Saints by a 36-32 final that was considered his best performance to date.

Since the current seeding system was introduced in 1999, the No. 4 seeds are 6-1 (.857) in conference championships.

The top seeds are 21-10 (.677), which is the second-best record in conference championship games. 

The Baltimore Ravens are hoping to become the latest fourth seed to advance to the Super Bowl, most recently joining the 2011 Giants, 2008 Cardinals and 2000 Ravens.

The New England Patriots averaged 34 points and 417 yards per game in their five regular season games without Rob Gronkowski.

With Gronkowski in the lineup, the Patriots averaged 35 points and 433 yards over 11 games.

Frank Gore averaged 5.4 yards per carry in the nine games started by Alex Smith.

But with Colin Kaepernick starting, Gore has averaged just 3.9 yards per carry.

Gore is more comfortable in power sets, but the San Francisco 49ers have used more shotgun and Pistol formations.