A cynical man might say this whole NFL football season has been a fix what with cockeyed endings, strange referee calls, loads of interceptions on questionable pass attempts, blown easy field goal attempts and now, the San Francisco 49’ers scoring 21 points in the final quarter to beat Seattle. I’ll allow that thought to sit with a note that compared to this time last year, the average Adultfyi pool record is off by 25 wins. Which is to say no one can figure out this season. All I can say with that is congrats to Karl the Birdman and Serenity for having the nerve to pick the 49’ers Thursday night.

SEATTLE – The setting was perfect for Alex Smith to fail: The San Francisco 49ers were trailing, it was cold and wet, and the crowd expected another Seattle Seahawks’ division title.

Instead, with crisp, confident passes and nimble running, Smith put together the best 15 minutes of his young career. Smith accounted for three fourth-quarter touchdowns – two passing, one running – and the 49ers prevented the Seahawks from clinching the NFC West with a surprising 24-14 win on Thursday night.

“The boy just became a grown man today, baby,” 49ers’ running back Frank Gore said of his quarterback. “There’s a lot more to come.”

Keeping the 49ers’ slim playoff hopes alive, Smith tossed an eight-yard touchdown pass to Vernon Davis early in the fourth quarter, then capped a 10-play, 73-yard drive with a 20-yard TD pass to Gore with 4:01 left that sent soaked – and shocked – Seahawks’ fans for the exits.

One play after a delay-of-game penalty on third-and-one, Smith stepped out of Kelly Herndon’s grasp, scrambled and found Gore behind defence near the goal-line. San Francisco’s players erupted into celebration, as the 49ers (6-8) broke a three-game losing streak and swept both games from Seattle.

“I think we always knew (we could beat Seattle),” Smith said. “I think that changed a couple of weeks ago when we beat them at our place.

“I think this team grew up a little bit tonight.”

If his fourth-quarter passing wasn’t enough, Smith faked the entire Seattle defence and jogged 18 yards for a touchdown with 1:42 left to cap a night when he looked just a little like Steve Young and Joe Montana.

The turnaround was startling, after the 49ers’ offence went the first 44 minutes with just four first downs and rarely looked threatening. San Francisco rolled up 196 yards in the fourth.

Meanwhile, the questions only continue about the Seahawks (8-6), who lost their second straight divisional game, ending any hopes of getting a first-round bye in the playoffs.

“We need to find a way to win this week or next week or somehow,” Seattle’s Bryce Fisher said. “Otherwise there’s going to be a lot of us getting our lockers cleaned out.”

Smith finished 14-of-25 passing for 162 yards, a far cry from the first half when he was 5-of-12 for 38 yards and the 49ers best offensive play was a 33-yard run on a fake punt.

It was Smith’s completion to Antonio Bryant late in the third that finally got the 49ers’ offence on track.

Smith’s 11-yard completion to Bryant with 48 seconds left in the quarter was San Francisco’s first first-down of the half. On the next play, Arnaz Battle beat Herndon off the line of scrimmage and Smith hit him in stride for a 54-yard completion.

Two plays after hitting Battle for 13 yards on third-and-10 at the Seattle 22-yard line, Smith rolled right and Davis got separation from safety Jordan Babineaux in the end zone.

With Smith finding holes in Seattle’s secondary, Gore put the game away. Gore, who ran for a franchise record 212 yards in the first meeting between the two teams, had 104 of his 144 yards in the fourth.

“When we go at them, it’s hard to stop us,” Gore said. “We kept going downhill at them and they couldn’t hold up.”

Matt Hasselbeck threw a 22-yard touchdown to Jerramy Stevens with nine seconds left, for the final margin, but Hasselbeck was outplayed by Smith.

Hasselbeck finished 20-of-37 passing for 220 yards, but threw a pair of interceptions, the most damaging on the first possession of the second half.

On second-and-11 at the San Francisco 20-yard line, Hasselbeck tried to hit D.J. Hackett on a seam route in the end zone. Instead, 49ers’ safety Mark Roman stepped in front and intercepted the pass, returning it to the 27-yard line.

Shaun Alexander rarely found holes to run through in the second half. Alexander had just 16 yards rushing in the second half, and failed when Seattle needed a yard to keep its best drive of the fourth quarter alive.

On third-and-one at the 49ers’ 27-yard line, Alexander was held to no gain. Seattle went for it on fourth down, but Mack Strong was stopped short with 9:37 left, causing coach Mike Holmgren to flail his arms on the sideline in disgust.

“I was trying to be aggressive. I always think we can get that,” Holmgren said. “Normally we convert those.”

Alexander was held to 73 yards, 40 coming on Seattle’s first quarter scoring drive, capped by a three-yard plunge by Alexander, just his fourth rushing touchdown of the season.

Joe Nedney kicked a 39-yard field goal with three seconds left in the first half.

Notes: San Francisco lost C Eric Heitmann to a broken right leg in the first quarter. Tony Wragge took his place . . . A heavy rainstorm moved in shortly before kickoff leaving standing water on the field and momentarily knocking out power to the video screens in the stadium. The worst of the storm subsided during the game.