Flacco is 1-0 against Brady in postseason games.
Sure, Flacco was just the 18th-ranked quarterback in the NFL this season, but he's the only one since the NFL-AFL merger in 1970 to reach the playoffs in each of his first four seasons. Brady did it in two of his first four.
And the Patriots defense has struggled during the regular season. Only one team allowed more yards passing during the regular season.
The defense did have an outstanding game in last Saturday night's 45-10 divisional win, giving up just 252 yards, but that was against the overmatched Tim Tebow and the Denver Broncos.
"Last week won't have anything to do with this week," Patriots defensive tackle Vince Wilfork said. "We have to play better. We have to make more plays because each game you play it gets tougher and tougher, especially when you're dealing with a ball club we're going to face in the Ravens. They're a stingy team."
"They have a great running game," Patriots cornerback Devin McCourty said, "but as a secondary, you've got to realize Anquan Boldin (has been) a great receiver for years in this league and so is Lee Evans. Then with Torrey Smith being a rookie, what jumps out on the (video) screen is that he can fly and he gets vertical."
They don't have Andre Carter, their leader in sacks before a knee injury ended his season in the 14th game.
"You can't say enough about (Chung)," cornerback Kyle Arrington said. "He brings a very physical element, or more physical element, to our defense. His presence is definitely known and felt when he's back in the lineup."
But they and Flacco were at their best against the best.
They're 7-0 against playoff teams, including a 20-13 win over the Houston Texans in last Sunday's divisional game.
In those games against playoff teams, Flacco has thrown for 10 touchdowns and just two interceptions against four of the NFL's top seven-rated defenses - Pittsburgh (first), Houston (second), San Francisco (fourth) and Cincinnati (seventh).
"Joe Flacco is a very capable quarterback," defensive backs coach Josh Boyer said. "He is a guy that can throw the ball 65 yards down the field. He can hit the intermediate routes. He is very smart. He understands when to go to the check downs. Even at times he takes some good sacks. He doesn't put his team in bad situations."
But he's unlikely to lead one sustained drive after another.
Still, if he doesn't give the opponent extra chances by turning the ball over, the Ravens could score enough to win behind their dominant defense.
Especially against a Patriots defense that allowed an average of 411.1 yards during the regular season.
"I see a very capable defense," he said. "I see a lot of talented players who play very hard. (They have) a very big, physical front, talented back end, (and are) obviously well-coached with a good scheme. So I see a big obstacle in front of us."
Of course, this is no time to point out an opponent's weaknesses.
Wilfork isn't about to do it either.
Flacco "has great poise in the pocket," he said. "He's going to stand in that pocket and deliver a good football even if he's getting hit. ... You can't ask for anything better. A quarterback that can take a beating and licks and still deliver the ball downfield, that's pretty good. We have our hands full there also.
"There are a lot of things that we have to do very well to be successful. It's not just slowing down their running attack."