Alex Smith did the right thing by telling doctors he was concussed, but it could cost him a lot of money in the offseason. By BrokenSphere (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons

Then Alex Smith got hit. In the head. Again.

He “turned himself in” to team doctors as the NFL has been encouraging its players to do. He hasn’t seen the field since.

Instead, 49ers coach Jim Harbaugh turned to second-year quarterback Colin Kaepernick. Kaepernick has a rifle arm — noticeably better (on TV even) than 90 percent of NFL starting quarterbacks. He’s also really fast. I’ll get to that in a minute.

Harbaugh keeping Kaepernick in the lineup instead of bringing back Smith (once he was cleared) was easy to criticize. The list of quarterbacks who win or even get to the Super Bowl in their first season as a starter is really short. No matter what Harbaugh thought, I didn’t think San Francisco stood a chance with a second-year player and first-time starter. I thought Harbaugh’s lack of patience with Alex Smith was going to hurt the team’s chances and maybe help to even prematurely close their championship window. After amazing improvement at Stanford and now with the 49ers, I thought Harbaugh had finally made a decision that was going to blow up in his face. Benching a guy who was playing like Smith couldn’t have been the right move, could it?

On Saturday, Kaepernick diced-up the Packers like a slap-chop. Green Bay had no answer for the read option or Kaepernick’s ability to find open receivers down field and get the ball to their hands on a rope. When the second-year player from Nevada ran for his second touchdown that put the 49ers up 31-24 in the third quarter, a lead they would not relinquish, I though, “My God! He’s Michael Vick with a bigger body and more accurate throwing arm.”

//www.youtube.com/watch?v=UWRyj5cHIQA

I stand by my assessment, and I want to say I’m sorry. Apologies, Jim Harbaugh. Apparently you saw him in practice for a year and a half and knew what you were doing. I shouldn’t have second-guessed you. The 49ers’ offense looked as dynamic and exciting as any I’ve seen recently. If the NFC Championship game was at Candlestick, I’d predict your team as the clear-cut favorites. As it stands I’ll probably pick them to win the game on the road anyway — unless I think too hard about Ben Roethlisberger.

In Roethlisberger’s first year as a starter (2004), the Steelers went 13-0 under Big Ben in the regular season. Roethlisberger was a revelation. His team earned a first-round bye and won their divisional playoff game before losing the AFC Championship to New England, who won the Super Bowl that year. Kaepernick has done a Roethlisberger-like job so far — a performance good enough to win me over on his coach’s decision no matter what happens next week.

Kaepernick’s divisional win was definitely one for the record-books, putting him up alongside rookies like Roethlisberger. To win a conference championship game on the road after only 9 NFL starts, though, would be nothing short of legendary.