That's how Joe Flacco got all his playoff wins, by having a dominate defense completely shutting down the other team.
2009 Playoffs Ravens
W 27-9 Dolphins
W 13-10 Titans
L 14-23 Steelers
2010 Playoffs Ravens
W 33-14 Patriots
L 3-20 Colts
2011 Playoffs Ravens
W 30-7 Chiefs
L 24-31 Steelers
2012 Playoffs Ravens
W 20-13 Texans
L 20-23 Patriots