The 6-foot-1, 215-pound defenseman has appeared in 530 career NHL games, all with the Rangers and Lightning over eight seasons, posting 53 goals and 241 points to go along with a plus-142 rating. The former New York captain led the Rangers for blocked shots and average time on ice during the 2017-18 season prior to being traded to Tampa Bay. McDonagh served as captain of the Rangers for four seasons.
"I'm very excited to sign an extension that will keep me with the Lightning organization for the next eight seasons," McDonagh said. "Since being traded to Tampa Bay earlier this year, my experience with the city, my teammates and the fans has been nothing short of world-class. My family and I are very excited to continue to play and live in Tampa with the ultimate goal of helping to bring the organization its second Stanley Cup."
The St. Paul, Minnesota native has also represented Team USA at the 2017 World Cup of Hockey, 2014 Winter Olympics, 2011 IIHF World Championships and 2009 World Jr. Championships. McDonagh has also been selected to two NHL All-Star Games (2016 & 2017).
McDonagh was originally drafted by the Montreal Canadiens in the first-round, 12th overall, at the 2007 NHL Draft.