A look at the newest Vikings

Position: Guard

Previous team: San Francisco

Height, weight: 6-8, 300 • Age: 28

College: Ohio State

Draft: Undrafted, 2009

Contract terms: Four years, $26.8 million with $10 million guaranteed

Comment: Played both guard spots for the 49ers, starting 59 of 77 career games. He played left guard in 2015. He also can play tackle in a pinch. …Two-time Pro Bowl selection. … After a 2013 game in which Packers linebacker Clay Matthews drew a $15,000 fine for a late hit on 49ers QB Colin Kaepernick, Boone was asked what kind of fine he would give Matthews. "Probably punch him in the face," Boone told CSNBayArea.com. "I don't want his money."

Previous team: Tennessee

Height, weight:  6-0, 215 • Age: 31

College:  Texas

Draft: First round (19th overall), 2007

Contract terms: One year, $2.5 million

Position: Outside linebacker

Previous team: Cincinnati

Height, weight:  6-4, 245

Age: 26

College: Kansas State

Contract terms: Two years, $6 million, $2.5 million guaranteed.

Comment: Started 13 games for the Bengals in 2014, but only two in 2015. … Made 91 tackles and had seven passes defensed in 2014. Made 40 tackles in 2015. … Injured a knee in the 2015 regular-season finale and missed the Bengals' playoff game. … Missed the 2013 season because of a shoulder injury suffered during preseason.

Position: Outside linebacker

Previous team: Detroit

Height, weight:  6-2, 235 • Age: 28

Draft: Seventh round (223rd overall), 2012

Comment: Played in 15 games for Lions in 2015, starting four. Finished with 21 tackles and one sack. Appeared in 27 games, with no starts, in first three years in NFL. … Played extensively on special teams during his Lions career.