SAN FRANCISCO (AP) - Brett Favre completed one pass and also got clobbered on a sack that lost Minnesota 10 yards.
Favre's highly anticipated first game back with the Vikings lasted all of four unspectacular plays and one series in a 15-10 loss to the 49ers in a nationally televised preseason game Sunday at Candlestick Park, the only NFL show of the night.
Favre completed a 13-yard pass to Adrian Peterson on his first play from scrimmage but was sacked by Pro Bowl linebacker Patrick Willis two plays later and the Vikings wound up punting. The 40-year-old quarterback took the field just four days after his first training camp practice of the year. He decided to return for a 20th season and make yet another run at a Super Bowl title.
It's hard to make much of the small sampling. Not that Favre's numbers mattered to the Vikings, just thrilled to have him back.
Alex Smith, Favre's 49ers counterpart, went 9 of 13 for 88 yards in a solid first half. Willis had four tackles playing only nine snaps.
After that single series, Favre headed to the bench and gave way to backup Tarvaris Jackson - who had been in line to be the starter before Jared Allen, Ryan Longwell and Steve Hutchinson flew to Mississippi early last week to recruit Favre back to the Twin Cities. Favre, sporting a 5-o'clock shadow peppered with gray, could be seen laughing on the sideline in the second half.
Smith bounced back a week after stumbling through a subpar outing in which he completed 3 of 9 passes for 37 yards and only two first downs in a win at Indianapolis. David Carr and Nate Davis rallied the Niners to 34 straight points in the 37-17 victory.
He made do for a 49ers offense missing three of its biggest stars: receiver Michael Crabtree, tight end Vernon Davis and running back Frank Gore.
"We just came out against the No. 1 rush defense in the NFL and marched it down the field," Smith said. "We were moving the chains and getting a bunch of third-down conversions and just took it down the field methodically."
Smith completed his first four passes for 48 yards and 5 of his first six on the Niners' opening drive, including a 24-yard strike to backup tight end Delanie Walker that set up a 4-yard scoring run by rookie Anthony Dixon.
After all the drama that surrounds Favre each offseason - will he or won't he really retire? - he's back in his No. 4 jersey and told his teammates he's as committed to this as ever.
And why not keep going?
Favre is coming off a year in which he threw for 4,202 yards and 33 touchdowns and established career highs for completion rate (68.4), quarterback rating (107.2) and fewest interceptions (seven).
He was booed by the crowd Sunday when running onto the field for the first time midway through the first quarter. Favre has been the Niners' nemesis for years.
In late September last year, Favre hit Greg Lewis on a 32-yard touchdown with 2 seconds left as the Vikings stunned San Francisco 27-24 in Minneapolis. That was the first of six straight road losses - five in a row by a combined 19 points - for the 49ers that helped cost them a playoff trip and a winning season.
Davis, San Francisco's No. 3 QB and fifth-round pick last year, completed a pretty 60-yard pass to Ted Ginn Jr. in the third quarter with his foot planted at the goal line when he released the ball. The pass set up Joe Nedney's 28-yard field goal. Davis later had an 18-yard completion to Nate Byham.
Longwell kicked a 40-yard field goal early in the second quarter for the Vikings' first points. Minnesota rookie quarterback Joe Webb broke loose up the middle for a 48-yard TD run with 1:54 to play, then Webb was sacked by Derek Walker in the end zone for a safety on the final play of the game.
Former Stanford star and Heisman Trophy runner-up Toby Gerhart got his first of his four carries for Minnesota midway through the second quarter, a 3-yard gain. This marked the rookie's first game back in the Bay Area since the Vikings selected him at No. 51 in the second round of this year's draft. Gerhart, who rushed for 1,871 yards and 28 touchdowns for the Cardinal last year, also caught two short passes.
Notes: Minnesota CB Chris Cook had his 87-yard fumble recovery for a touchdown overturned based on review, which showed Dixon was down by contact. ... CB Phillip Adams, the 49ers' seventh-round draft pick, broke up three passes. ... The Vikings placed WR and punt returner Jaymar Johnson on season-ending injured reserve with a broken left thumb that he hurt in the team's exhibition opener last Saturday at St. Louis. ... Former San Francisco WR Brandon Jones signed with the Seahawks.