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Packers at 49ers | Saturday, 8

Consistency now a trademark of Packers defense

Green Bay ranked among the top half of NFC teams in nearly every defensive category.

Jonathan Daniel/Getty Images

Green Bay ranked among the top half of NFC teams in nearly every defensive category.

GREEN BAY, Wis. — The Packers could have filled an entire highlight reel with their interceptions last year.

Good thing, because the rest of their defense wasn’t worth watching.

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A year after finishing with the NFL’s worst defense, the Packers have traded the excitement of those big turnovers for consistency. And the change could be the difference between another early exit from the playoffs and a deep run that could last all the way to the Super Bowl.

‘‘I’d prefer our defense this year to last year’s,’’ defensive coordinator Dom Capers said.

The Packers (12-5) play at San Francisco (11-4-1) on Saturday night in an NFC divisional game.

Green Bay rolled through the regular season in 2011 with a defense every bit as explosive as its high-powered offense. The Packers led the league with 31 interceptions, and no quarterback — rookie or veteran — was safe from their sticky hands. Four of the picks were returned for touchdowns.

Even as the Packers cruised to a 15-1 record and the NFC’s No. 1 seed, however, there were signs of trouble with the defense. Green Bay ranked dead last in the NFL in both yardage (almost 412 per game) and yards passing (almost 300). Their 6,585 yards allowed was the worst in team history, as were the pass attempts (637), completions (390), and yards passing (4,796).

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And all those flaws were exposed when Green Bay played the New York Giants in the divisional round. Eli Manning threw for 330 yards and three touchdowns and Hakeem Nicks had seven catches for 165 yards as the Giants tossed the defending Super Bowl champions out of the playoffs with a 37-20 win.

The Packers don’t have nearly as many takeaways this time — they finished the regular season with 18 — but they’re no longer pushovers, either. They jumped to 11th in total defense, and their average of 337 yards allowed per game is a 75-yard improvement. Opponents passed for an average of 218 yards against Green Bay, also 11th best in the NFL.

They ranked in the top half of the NFC in every defensive category except run defense. And you can thank Adrian Peterson for that.

‘‘I don’t know what the answer is,’’ B.J. Raji said. ‘‘I just know we left last year in the past and took the approach that this is a different year and we wanted to improve our ranking.’’

The Packers have done all this despite losing Charles Woodson for half the season with a broken right collarbone. Clay Matthews (hamstring) and C.J. Wilson (knee) also missed four games each.

But the injuries also forced Green Bay to play its young guys, and their speed and athleticism has turned out to be a boon.

‘‘We’re just a more consistent, more multiple defense this year,’’ Capers said. ‘‘I think we can attack you in different ways. I think we’ve got more athletic ability on our defense this year than we had. I think these young guys have given us more athletic ability, more speed, more pass rush ability.

‘‘You look at our sack numbers in terms of from last year to this year, there’s a big difference,’’ Capers added. ‘‘And our style of play, we need to do that.’’

Only Denver and St. Louis (52 each) and Cincinnati (51) had more sacks than Green Bay (47).

Even with missing four games, Matthews finished with 13 sacks, second most in the NFC and a half-sack off his career high.

‘‘They’re just playing good defense,’’ San Francisco offensive coordinator Greg Roman said. ‘‘Sound defense, good team defense, not allowing the big plays that showed up last year.’’

Now, just because this Green Bay defense is sound doesn’t mean it’s stodgy or boring.

Quite the contrary.

Rookie Casey Hayward tied for fifth in the NFL with six interceptions. Jay Cutler is no doubt thrilled he’s got at least seven months before he has to see a Packers defensive back.

But substance matters as much as style, and Green Bay has it this year.

‘‘No doubt about it,’’ cornerback Tramon Williams said. ‘‘I’m pretty sure that’s not hard to see that we’re a better defense from last year.’’

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