General manager Trent Baalke said in a statement Wednesday that "this contract allows Justin to finish his career as a 49er!"
The 33-year-old Smith was sidelined the final 2 ½ games of the regular season, ending his streak of 185 consecutive starts. He returned in the playoffs to help the 49ers reach the Super Bowl, where they lost to the Baltimore Ravens.
Smith has made the Pro Bowl four straight seasons. Since joining San Francisco in 2008, he has 536 tackles, 32 sacks, seven forced fumbles, four fumble recoveries and one interception.
More Sports Headlines
Snohomish mixed martial artist returns to her first love Mariners beat Twins 4-3 in 11 innings Charles scores 29 points, Liberty beat Storm 78-62 Park wins Women's British Open, captures 4th different major Perry wins 2nd straight Champions Tour's 3M Championship Merritt shoots 67 to win Quicken Loans National by 3 shots Triple Crown winner American Pharoah wins $1.75 million Haskell Invitational Bills' Ryan names Incognito starting left guard
Our new comment system is not supported in IE 7. Please upgrade your browser here.