Ronald Martin Hainsey (born March 24, 1981) is an American professional ice hockey player and alternate captain for the Ottawa Senators of the National Hockey League (NHL).
He has previously played in the NHL for the Montreal Canadiens, Columbus Blue Jackets, Atlanta Thrashers, Winnipeg Jets, Carolina Hurricanes, Pittsburgh Penguins and Toronto Maple Leafs, playing over 1,000 career NHL games.
Hainsey played professional hockey for nearly 16 years (907 games) before playing on a team that made the playoffs, longer than any other player in league history.
He then won the Stanley Cup with the Penguins in his debut playoff appearance, finishing second in ice time for the playoffs in place of the injured Kris Letang.