The New York Rangers bought out Shattenkirk last Thursday after he spent two seasons with the club.
The 30-year-old recorded 28 points in 73 games with New York this past season, and he produced 23 points over 46 contests during his first campaign with the Rangers in 2017-18.
Once a productive offensive defenseman and power-play quarterback, Shattenkirk will now hope to revitalize his career as part of the Lightning's prolific offense. He'll join Victor Hedman, Ryan McDonagh, and Mikhail Sergachev, among others, on the team's blue line.
The signing brings yet another former Ranger to Tampa Bay, a common occurrence in recent years. McDonagh is the only other notable example remaining on the roster, but Dan Girardi, Anton Stralman, J.T. Miller, and Ryan Callahan contributed to the franchise's success over the last handful of seasons.