Detroit Clocks the 49ers : Pro football: Lions give San Francisco 10 extra seconds, but it does no good as Brien’s field-goal try misses.

The Detroit Lions, winless entering the game and with some fans calling for Coach Wayne Fontes’ dismissal, delivered the biggest jolt of the NFL season Monday night.

They beat the Super Bowl champion San Francisco 49ers, 27-24, when 49er kicker Doug Brien missed a 40-yard field goal as time expired, the ball bouncing off the right upright.

“It’s just one win,” Fontes said. “I’m not going to jump up and down. It’s just a win. I’ve been here a long time and I have faith in my team.”

In sending San Francisco to its first loss of the season, Jason Hanson kicked the winning 32-yard field goal with 1:12 remaining and the Lions prevailed without a big game from Barry Sanders.

The Lions began the winning drive on their 26 with no timeouts left. Scott Mitchell passed to Herman Moore for 12 yards, Brett Perriman for 22 and Aubrey Matthews for 11. That moved the Lions to the 49ers’ 16.

Mitchell’s sneak on third and one was short by inches. But instead of going for the field goal, with 2:46 remaining, Fontes signaled Mitchell to go for it again. This time he slid off right guard David Lutz for two yards.

“I just thought there was way too much time on the clock,” Fontes said. “They’re too good of a team. I wanted to take as much time off the clock as possible.”

The Lions (1-3) then ran Sanders into the line three times, each for no gain, and Hanson came on for the winner.

“We never quit,” Mitchell said. “These guys really stayed together.”

Before the go-ahead field goal, the 49ers (3-1) had used their last timeout. But with the game clock running, the Lions snapped the ball for Hanson’s kick with more than 10 seconds left on the play clock, giving the 49ers additional time to move downfield for their last drive.

Then Steve Young, who has directed so many winning drives for the 49ers, took his turn. Out of timeouts, he marched the 49ers from their own 20 to the Lions’ 22 to set up Brien’s try.

Young completed 27 of 44 passes for 349 yards and two touchdowns, with one interception. Jerry Rice had 11 catches for 181 yards. It was Rice’s 51st 100-yard game, breaking Don Maynard’s NFL record.

Mitchell, taking up the slack when the 49ers’ defense stacked up to stop Sanders, completed 28 of 42 for 291 yards and one touchdown. Mitchell also ran for a touchdown.

Sanders was held to 24 yards in 17 carries.

Mitchell’s 20-yard touchdown pass to Moore, followed by Mitchell’s pass to Perriman for the two-point conversion, gave Detroit a 24-17 lead with 10:41 left in the fourth quarter. But the Lions used their third and final timeout just before the conversion.