SPARTANBURG, S.C. — Missing two starters due to injury, the Carolina Panthers have added depth at linebacker.

Carolina signed Kelvin Smith on Friday and released long-snapper Nick Sundberg. The move comes with Thomas Davis sidelined with a sprained right knee and Jon Beason out with a sore left hamstring.
Smith was drafted by Miami in the seventh round in 2007. He played in four games as a rookie before spending last season on injured reserve with a knee injury. Smith was waived last week by the New York Giants.
Sundberg is an undrafted rookie who fell behind J.J. Jansen in the competition for Carolina’s long-snapping position.