Oakland Raiders quarterback Jason Campbell has left an exhibition game after being injured on a sack, according to an Associated Press report. Campbell landed hard on his right shoulder after being sacked by San Francisco linebacker Travis LaBoy on Saturday night. He was diagnosed with a stinger. Campbell was down on the ground for about five minutes before being carted off the field.

49ers nose tackle Aubrayo Franklin ended his lengthy holdout Saturday by signing a $7.003 million franchise tag tender. San Francisco defensive coordinator Greg Manusky said this week that while Franklin had fallen behind his teammates by missing camp, he believed the nose tackle could get up to speed for the opener by playing in the exhibition finale next Thursday against San Diego. Franklin has recorded 291 tackles, four sacks, one interception and three forced fumbles in his seven-year career.

Nose tackle Aubrayo Franklin will sign his franchise tender and report to the San Francisco 49ers on Saturday, according to a league source. Franklin has stayed away from training camp while hoping to work out a long-term contract extension. Instead, the seven-year veteran will play under the $7 million franchise tag this season.

Rookie DB Philip Adams joined the Niners' punt-returner competition at training camp this week. Projected rookie starter Kyle Williams is out indefinitely with a sprained right big toe. Undrafted rookie LeRoy Vann was cut in the second week of training camp and his replacement, Bobby Guillory, has flubbed two punts in two exhibition games. San Francisco prefers Ted Ginn Jr. not to add punt returns to his plate of wide receiving and kick returning.

Vikings quarterback Brett Favre will start against the 49ers on Sunday night just a few days after deciding to rejoin the team. Coach Brad Childress said that Favre will likely play just a series or two. Childress said ideally the first series would go 10 plays for Favre because, "that's what he needs right now and all he's ready for right now." "I think he's doing a good job of rounding into," form, Childress said. "He has been throwing the football, there is no question about that. Just conditioning his legs. ... He's versed in our system and our calls."

The 49ers have used running backs Frank Gore and Brian Westbrook together in the backfield during practices this week. Gore and Westbrook were paired together for about six snaps on Thursday. San Francisco signed Westbrook on Monday.

The 49ers aren't simply going to hand the No. 2 running back job to Brian Westbrook. San Francisco signed Westbrook earlier this week to help spell starter Frank Gore. Rookie Anthony Dixon is going to get a chance to be the team's top reserve despite Westbrook's advantage in the experience department. "I like the way he ran with the football and his physicality," offensive coordinator Jimmy Raye said of Dixon. "We had some concerns about his ability to play without the ball. He demonstrated otherwise. His performance in his first opportunity, in his first year, was pretty good."

The 49ers have signed free agent running back Brian Westbrook to a one-year deal, according to an Associated Press report on Monday. Westbrook has been looking to find a job, visiting several teams in recent months. He was released by the Eagles in February after an injury-filled 2009 season.

The Seahawks have acquired defensive lineman Kentwan Balmer from the 49ers, according to multiple sources. A league source told ESPN NFL Insider Adam Schefter that the 49ers received a sixth-round pick in the 2011 NFL draft in return for Balmer. Balmer was a first-round pick of the 49ers in 2008.

The 49ers are shopping defensive lineman Kentwan Balmer around the NFL in hopes of finding a trade partner for the team's top pick in the 2008 draft, according to team sources. Balmer, 23, left the team last week for reasons described as "personal."