Tom Pelissero of USA Today reported it is a four-year, $26.8 million contract with $10 million fully guaranteed. Boone will make $6.7 million in the first year, per Pelissero.
Minnesota confirmed the deal on Thursday.
"After five minutes, I already love Teddy Bridgewater and will do everything I can to protect him,'' said Boone, via Chris Tomasson of the St. Paul Pioneer Press. Boone added that he would feel most comfortable at left guard, per VikingUpdate.com.
The 28-year-old was a pillar of San Francisco's offensive success, especially in the running game, from 2011 to 2014. He emerged from the shadows as an undrafted free agent in 2009, playing in all 16 games during his second season and becoming a full-time starter in 2012.
Before the 2013 season, Jeff Deeney of Pro Football Focus named Boone the 49ers' secret superstar for his performance in 2012:
Boone was a force in the running game as his +18.6 run blocking grade was best among all right guards. He also ranked second among all guards by receiving a negative grade on only 4.7% of his run blocks. Boone also held his own in the passing game as he earned a +2.1 rating during the regular season, and his 20 QB pressures allowed tied him for 17th lowest out of 50 guards who played at least 400 passing snaps.
The physical toll of playing in a power offense started catching up with Boone over the last two seasons, as he missed a total of four games. His career in San Francisco ended prematurely, as a torn MCL suffered in Week 14 last year landed him on injured reserve.
Boone's production also suffered in 2015 when he switched to left guard, and Matt Claassen of Pro Football Focus noted it was the first year of his career that he posted a negative run-blocking grade.
Playing on the interior offensive line has made Boone almost invisible, but this is still a player in the prime of his career moving on to a better situation than the one he left in San Francisco. Boone will be playing with Bridgewater and Adrian Peterson, a significant upgrade over the 49ers' current personnel.
Boone is a powerful, physical guard who has shown tremendous athleticism. Even as he approaches 30, this is a player whose intensity and preparation will keep him performing at a high level for years to come.