From ESPN:

Former Seattle Seahawks linebacker David Hawthorne agreed to terms Tuesday on a five-year contract with the New Orleans Saints.

Hawthorne, 26, is coming off a season in which he notched a career-high three interceptions to go with 115 tackles. He became a starter in 2009 after signing with Seattle as an undrafted free agent out of TCU in 2008.

Hawthorne has led the Seahawks in tackles for three straight seasons, notching at least 100 tackles each year.