49ers-Packers: Now to see if Jim Harbaugh's QB gamble pays off

San Francisco Coach Jim Harbaugh took a risk in replacing quarterback Alex Smith with Colin Kaepernick. The second-year player isn't playoff-tested, but he brings more potential for big plays.

Gambling isn't allowed in the NFL, but San Francisco 49ers Coach Jim Harbaugh made a wager this season that would leave even the highest of high rollers weak in the knees.

He replaced hot-handed quarterback Alex Smith with Colin Kaepernick, a promising but largely untested second-year player.

That turned out to be a major roll of the dice — maybe the biggest in the league this season — and whether it was a wise move is still up for debate. The determining factor will be how well Kaepernick plays in the postseason, which for the 49ers begins Saturday night against Green Bay at Candlestick Park.

"Jim went all in, that's his nature," said ESPN's Steve Young, who in the early 1990s took over as quarterback of the 49ers from Joe Montana. "So when Colin played well in Chicago [in a 32-7 victory over the Bears on Nov. 19], Jim's reaction was, 'I've been looking for this.' … I don't think he looked back."

Smith led the 49ers to the doorstep of the Super Bowl last season, directing a home victory over New Orleans in the divisional round before losing in overtime to the visiting New York Giants in the NFC championship game.

Saturday, the 49ers and Packers will meet for the sixth time in the postseason, with Green Bay holding a 4-1 edge in the previous playoff games.

Facing the Packers is especially meaningful for Kaepernick, who was born in Milwaukee and lived in Fond du Lac, Wis., before moving to California at 4. He was a Packers fan as a kid, and a Brett Favre fan in particular.

"He was just a playmaker," Kaepernick said. "He wasn't afraid to take chances. He was passionate about the game and he was going to do anything he could to help his team win."

Now, Kaepernick has the chance to do the same in the biggest game of his career. The choice to switch to Kaepernick is more evidence that Harbaugh is anything but risk-averse.

Kaepernick, a second-round pick of the 49ers in 2011, got the starting nod as a fill-in for Smith, who had suffered a concussion against St. Louis. In the eight quarters that preceded that injury, Smith completed 32 of 35 passes for 385 yards with five touchdowns, an interception, and a passer rating of 140.2. In other words, he had more touchdowns than incomplete passes.

And with Smith at quarterback on this season's kickoff weekend, the 49ers beat the Packers, 30-22, at Lambeau Field.

But based on a feeling he had, Harbaugh stuck with Kaepernick, who's more mobile and has a greater potential for explosive plays.

"It was not a predetermined move," Harbaugh said this week, adding: "It's pretty well-documented how we feel about both guys, that one's our left arm, one's our right arm. And both are very good quarterbacks. And we felt we could win with either quarterback. And we're in a great situation having both those men on our team."

Although Smith played brilliantly in last season's divisional win over the Saints, the 49ers' offense ground to a halt in the championship game, when the San Francisco wide receivers combined for one catch. Upgrading that position was a priority in the off-season, with the team drafting receiver A.J. Jenkins in the first round (he's been a non-factor), and signing free agents Mario Manningham (now injured), and Randy Moss.

So successful was the team last season, the bar has been raised. Harbaugh, named the NFL's coach of the year in his debut season a year ago, is the eighth head coach since 1970 to win a division title in each of his first two seasons.

If Kaepernick were to struggle against the Packers, Harbaugh's decision to keep Smith on the bench would be dusted off, put under the microscope, and examined from every angle.

Kaepernick has put up impressive numbers in his seven starts. He has completed 136 of 218 passes (62.4%) for 1,814 yards with 10 touchdowns and three interceptions. He has run for 415 yards and five touchdowns.

"I applaud Jim Harbaugh for making the decision when he did, because it wasn't an easy decision to make," said Hall of Fame quarterback Troy Aikman, now a Fox analyst. "The easy thing to do would have been to go back to Alex Smith, and it wouldn't necessarily have been the wrong decision because Alex was playing really good football."

Harbaugh chose the path of greater resistance, and in the process bumped up the stakes.

"If it all blows up on Saturday, that will take a lot of goodwill out of the bank," Young said. "Now, that doesn't change much. I mean, [Harbaugh] is still going to be around, still going to be a great coach. But it's a high-risk situation.

"And where there's high risk, there's high reward."

sam.farmer@latimes.com

twitter.com/LATimesfarmer

la-sp-san-francisco-49ers-20130111
Photos: AFD Responds to Midtown Four-Plex on Fire » Photos: AFD Responds to Midtown Four-Plex... NASA Photos Show Pavlof Volcano Eruption from Space » NASA Photos Show Pavlof Volcano Eruption from... Photo Gallery: Aerial Views of Yukon River Ice Jam » Photo Gallery: Aerial Views of Yukon River... 2013 Gold Nugget Triathlon » 2013 Gold Nugget Triathlon Photos: Pavlof Volcano Erupting » Photos: Pavlof Volcano Erupting Spenard Farmer's Market Kicks Off 4th Season » Spenard Farmer's Market Kicks Off 4th Season Trekkies at the museum » Trekkies at the museum Bike to Work Day 2013 » Bike to Work Day 2013 Photo Gallery: Pamyua Plays for ANHC Crowd on Mother's Day » Photo Gallery: Pamyua Plays for ANHC Crowd on... Photo Gallery: Faster Than a Falcon 5k Run » Photo Gallery: Faster Than a Falcon 5k Run Photos: 'Back to the Future' DeLorean Replica » Photos: 'Back to the Future' DeLorean Replica Photo Gallery:  Back to the Future DeLorean Visits Alaska » Photo Gallery: Back to the Future DeLorean... Photo Gallery: APD Medals of Valor and Shield Awards » Photo Gallery: APD Medals of Valor and Shield... 13th Annual Bike for Women » 13th Annual Bike for Women Great Alaska Aviation Gathering Celebrates 16 Years » Great Alaska Aviation Gathering Celebrates 16... Photo Gallery: Commissioning of the USS Anchorage » Photo Gallery: Commissioning of the USS... Photo Gallery: 22nd Annual Salmon Run 2K, 5K and 10K » Photo Gallery: 22nd Annual Salmon Run 2K,... Photo Gallery: Walk and Roll for Hope 2013 » Photo Gallery: Walk and Roll for Hope 2013 Photos: On Board The USS Anchorage » Photos: On Board The USS Anchorage NYO 2013, Day 3 (More Photos) » NYO 2013, Day 3 (More Photos) Denali Base Camp » Denali Base Camp NYO 2013: Day 3: One-Foot High Kick, Seal Hop, Alaska Native Dance Performances, and Closing Ceremonies » NYO 2013: Day 3: One-Foot High Kick, Seal... Heart Run 2013 » Heart Run 2013 Native Youth Olympics Day 2: One Hand Reach and Two Foot Kick » Native Youth Olympics Day 2: One Hand Reach... Photo Gallery: Clark Mishler's 'Portrait Alaska' » Photo Gallery: Clark Mishler's 'Portrait... Photos: NYO 2013: Day 1 » Photos: NYO 2013: Day 1 Unalakleet Clean Water Struggle » Unalakleet Clean Water Struggle Slush Cup 2013 (part 2) » Slush Cup 2013 (part 2) Slush Cup 2013 (Part 1) » Slush Cup 2013 (Part 1) Newborn Reindeer Calves at the Palmer Reindeer Farm » Newborn Reindeer Calves at the Palmer... Piuraagiaqta 2013: Barrow's Spring Festival » Piuraagiaqta 2013: Barrow's Spring Festival Giant Pacific Octopus Eggs Hatching » Giant Pacific Octopus Eggs Hatching 2013 Arctic Man » 2013 Arctic Man 20th Alaska Custom Cycle Show » 20th Alaska Custom Cycle Show Hand Counting Write-In Votes: Ernie Hall vs. Nick Moe » Hand Counting Write-In Votes: Ernie Hall vs.... Food Truck Carnival in Spenard » Food Truck Carnival in Spenard Rage City Rollergirls » Rage City Rollergirls Photos: Deadly Shooting in Fairview, Anchorage Police Officers Involved » Photos: Deadly Shooting in Fairview,... Photos: 2013 Municipal Election » Photos: 2013 Municipal Election Photo Gallery: Helo-1 and Crash Victims » Photo Gallery: Helo-1 and Crash Victims Ida'ina Gathering 2013 at Dena'ina Center » Ida'ina Gathering 2013 at Dena'ina Center The 2013 Sportsman Show » The 2013 Sportsman Show Photo Gallery: 2013 'Choose Respect' March in Anchorage » Photo Gallery: 2013 'Choose Respect' March in... Photo Gallery: Food Bank of Alaska's Canstruction 2013 » Photo Gallery: Food Bank of Alaska's... Funeral Service for Fallen VPSO Thomas Madole Held in Anchorage » Funeral Service for Fallen VPSO Thomas Madole... Kali, Orphaned Polar Bear Cub, at Alaska Zoo » Kali, Orphaned Polar Bear Cub, at Alaska Zoo Photo Gallery: Alaska State Troopers Armored Vehicles » Photo Gallery: Alaska State Troopers... World Baseball Classic: Puerto Rico vs. Dominican Republic » World Baseball Classic: Puerto Rico vs.... Photo Gallery: Kulluk Loading Aboard Xiang Rui Kou » Photo Gallery: Kulluk Loading Aboard Xiang... Photo Gallery: Recovered Polar Bear Cub Delivered to Alaska Zoo » Photo Gallery: Recovered Polar Bear Cub... Museum in Mountain View Name Changed » Museum in Mountain View Name Changed World Baseball Classic: Semi Final Game One: Puerto Rico v Japan » World Baseball Classic: Semi Final Game One:... Matzah Bakery » Matzah Bakery 2013 Oosik Classic Ski Race/Tour » 2013 Oosik Classic Ski Race/Tour 2013 Shamrock Shuffle » 2013 Shamrock Shuffle Pink Floyd Light Show at the Anchorage Science Museum » Pink Floyd Light Show at the Anchorage... Daytona Bike Week: National Guard SuperBike Race 1 » Daytona Bike Week: National Guard SuperBike... World Baseball Classic Round 2 Miami: USA v. Puerto Rico » World Baseball Classic Round 2 Miami: USA v.... Photos: ASD Names New Superintendent as Jim Browder Retires » Photos: ASD Names New Superintendent as Jim... World Baseball Classic: Round 2 Miami, Game One: Italy v. Dominican Republic » World Baseball Classic: Round 2 Miami, Game... Photos: Empty Bowl Project at Egan Center » Photos: Empty Bowl Project at Egan Center Photo Gallery: Moose Rescue at Alexander Creek » Photo Gallery: Moose Rescue at Alexander... Jesus Christ Superstar » Jesus Christ Superstar Iditarod Day 5: Dropped Dogs in McGrath » Iditarod Day 5: Dropped Dogs in McGrath The 41st Annual Student art exhibition » The 41st Annual Student art exhibition Photo Gallery: Rotten Matanuska Creamery Cheese » Photo Gallery: Rotten Matanuska Creamery... Anchorage Police Respond to Armed Man near O'Malley Road » Anchorage Police Respond to Armed Man near O'... Iditarod Official Start (Aerial Photos) » Iditarod Official Start (Aerial Photos) Iditarod Official Start (Pre race, Mushers and Handlers) » Iditarod Official Start (Pre race, Mushers... Iditarod Official Start (Mushers 2 - 16) » Iditarod Official Start (Mushers 2 - 16) Iditarod Official Start (Mushers 17 - 67) » Iditarod Official Start (Mushers 17 - 67) Rondy Day 9: Running of the Reindeer pt 1 » Rondy Day 9: Running of the Reindeer pt 1 Rondy Day 9: Running of the Reindeer pt 2 » Rondy Day 9: Running of the Reindeer pt 2 Iditarod Ceremonial Start » Iditarod Ceremonial Start Rondy Day 8: Scale Model Club Exhibit » Rondy Day 8: Scale Model Club Exhibit