Sports Stats ‘on Tapp’ is a sports statistics blog published with a focus on stats that go beyond the numbers.

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The 2012 NFL season has come down to four teams and a pair of games this Sunday. The winners advance to the Super Bowl. Here’s a handful of stats that you might not know about matchups this weekend.

San Francisco vs. Atlanta
* The two teams have faced each other one time in the playoffs. The Falcons defeated the 49ers 20-18 in Atlanta on January 9, 1999.

* Atlanta has a 7-11 record in playoff games; the 49ers are 28-19 all-time in the playoffs.

* The Falcons are 4-2 in the playoffs as the home team; San Francisco is 2-10 as a road team in the playoffs.

* Atlanta is 3-0 when they score 30-plus points in a playoff game; the 49ers are 15-0 when they score 30-plus points in a playoff game.

* The Falcons are 4-0 in the playoffs when they hold the opponent under 20 points; San Francisco is 16-4 when they hold the opposition under 20 points in the playoffs.

* San Francisco leads the all-time series against the Falcons 44-30-1.

* Atlanta has won the last four games played between the two teams.

* The Falcons have won six of the last seven games played in Atlanta.

* The two teams have played nine times this century; the Falcons have won six. Seven of those nine games have been decided by eight points or less.

Baltimore vs. New England
* The two teams have faced each other twice in the playoffs. The Patriots defeated the Ravens last year in the AFC Championship game 23-20 in New England. They also played Jan. 10, 2010. The Ravens won that game 33-14.

* New England has a 23-15 record in playoff games; the Ravens are 12-7 all-time in the playoffs.

* The Patriots are 14-3 in the playoffs as the home team; Baltimore is 8-5 as a road team in the playoffs.

* New England is 7-1 when they score 30-plus points in a playoff game; the Ravens are 4-0 when they score 30-plus points in a playoff game.

* The Patriots are 15-2 in the playoffs when they hold the opponent under 20 points; Baltimore is 11-1 when they hold the opposition under 20 points in the playoffs.

* New England leads the all-time series against the Ravens 7-2.

* The two teams have split the last four games played in the series.

* The Patriots have won five of the last six games played at home against the Ravens.

* The two teams have played eight times this century; the Patriots have won six. Five of those eight games have been decided by eight points or less.

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