Linebacker who was a 7th round pick of the Seattle Seahawks in 2011. He became one of the team's defensive leaders and was named MVP of Super Bowl XLVIII after recording 10 tackles and returning an interception for a touchdown in Seattle's 43-8 blowout win over the Denver Broncos. In 2015, he signed with the Oakland Raiders.
He played college football at USC under Pete Carroll, who would later draft him and coach him on the Seahawks.
Behind Smith and cornerback Richard Sherman, the Seahawks constructed one of the NFL's top defensive units in 2013, leading to the franchise's first ever Super Bowl championship on February 2, 2014.