After all-day meetings between agent Drew Rosenhaus and the 49ers, Frank Gore has agreed to a three-year contract extension worth a maximum of $21 million, a league source told NFL Network insider Jason La Canfora on Tuesday.
Agent Jason Rosenhaus -- Drew's brother -- confirmed to The Associated Press later Tuesday that Gore had agreed to the terms of the three-year extension that will keep him with the team through 2014. The deal includes $13.5 million in guaranteed money.
The team hadn't made a formal announcement. That likely will come Wednesday, ahead of the Niners' exhibition finale Thursday night at San Diego.
Gore said earlier Tuesday that his primary agent, Drew Rosenhaus, had a productive, all-day meeting with team brass Monday. Gore said he instructed Rosenhaus to contact him when there was what he considered a "fair" offer on the table.
"Positive that they met face to face," Gore said. "Drew felt good about everything, (about) the talk."
Gore, 28, third on San Francisco's career rushing list heading into his seventh NFL season, has said he wants a new long-term deal before the Sept. 11 season opener against Seattle.
Both sides have been throwing around plenty of praise for the other party. 49ers team President Jed York and general manager Trent Baalke have said they want Gore to be a "49er for life."
Gore said he even spoke to Baalke about working for the organization when he's done playing.
"I told Drew, man, just call me when he feels right, when he feels what's fair for both sides," Gore said. "Hopefully I can be a Niner. I want to be here for my whole career. Our GM said he wanted me here for my whole career. Hopefully my side, their side can get it done."
While new coach Jim Harbaugh said he wouldn't address Gore's unsettled contract situation, he was optimistic the sides will come to an agreement soon.
"I'm very optimistic because Frank's a says-what-he-means, means-what-he-says guy," Harbaugh said. "Our organization is the same exact way. Like we've said, we'll deal with this man to man with Frank and with his agent, Drew, but Frank is a great guy. Frank is a true 49er. I've said that from when I first got here. That's how I thought I would feel about Frank Gore. Now, I know how I feel about Frank Gore. The guy is awesome. Somebody should do a movie. Somebody should do the Frank Gore story, because it's an awesome story."
The 49ers rewarded two other key players with long-term contracts last year.
Tight end Vernon Davis signed a five-year extension worth $37 million overall, including $34 million guaranteed, a night before the 2010 season opener. That made him the highest-paid tight end in NFL history.
In May of last year, All-Pro linebacker Patrick Willis received a five-year, $50 million contract extension that takes him through the 2016 season and includes $29 million in guaranteed money.
Gore didn't play in Saturday's 30-7 loss to the Houston Texans, and Harbaugh wouldn't say whether he would play in Thursday night's exhibition finale at San Diego. It's nothing new for him to sit, as Gore has rarely played during the preseason in the past.
Gore, who missed the final five games this past season with a broken right hip, held out for the first four days of training camp but has been his energetic, focused self on the field ever since.
There have been no signs of his 2010 injury, either. Gore hurt the hip in a Monday night game at Arizona on Nov. 29.
"I haven't noticed any lack of focus," quarterback Alex Smith said. "He's all in. He's here. He's been a part of everything. Jumped in full go, so I'm not really thinking or paying attention to any of that other stuff."
Gore needs 931 yards to become the franchise's all-time leading rusher. While that is a goal, he also wants to have a big year to help turn the 49ers around after eight consecutive seasons without a playoff berth or winning record.
He ran for 853 yards and three touchdowns last year before getting hurt in his sixth NFL season. Gore also caught 46 passes for 452 yards and two TDs. His 24 100-yard rushing games are the most in 49ers history.
The Associated Press contributed to this report.