Anaheim signed winger Corey Tropp and goaltender Dustin Tokarski to extensions.
Buffalo acquired defenceman Dmitry Kulikov and a 2016 second-round pick from Florida. They signed defenceman Casey Nelson to an extension. They signed defenceman Jake McCabe to an extension. They signed winger Cole Schneider to an extension,
Chicago acquired a 2016 fourth-round pick and 2017 sixth-round pick from the Islanders. They acquired a 2017 fifth-round pick. They signed defenceman Michal Rozsival and winger Brandon Mashinter to contract extensions.
Colorado acquired a 2017 fourth-round pick from the Rangers.
Columbus acquired defenceman Scott Harrington and a conditional 2017 fifth-round pick from Toronto. They signed defenceman Seth Jones to an extension. They bought out defenceman Fedor Tyutin. They signed centre Pierre-Luc Dubois. They bought out winger Jared Boll.
Detroit signed winger Drew Miller to an extension.
The Islanders acquired a 2016 fourth-round pick from Chicago. They acquired a 2016 fourth-round pick from Philadelphia.
The Rangers acquired defenceman Nick Holden from Colorado.
Ottawa acquired defenceman Patrick Sieloff from Calgary.
Philadelphia signed defenceman Mark Alt to an extension. They acquired a 2016 fourth-round pick from the Islanders.
San Jose signed winger Tomas Hertl to an extension.
Tampa Bay acquired a 2016 third-round pick from Arizona. They signed winger Tye McGinn and defenceman Matt Taormina to extensions. They signed centre Steven Stamkos to an extension. They bought out defenceman Matthew Carle.
Toronto acquired winger Kerby Rychel from Columbus.
Washington signed winger Tom Wilson to an extension. They signed winger Zach Sill to an extension.
Winnipeg acquired a 2017 seventh-round pick from Montreal.
This year's inductees for the Hockey Hall of Fame are controversial 90s power forward Eric Lindros; dominant 80s Soviet player, over-aged 1990 Calder winner, and decent NHLer Sergei Makarov; 34-years-retied goaltender Rogie Vachon; and beloved former coach Pat Quinn in the builder category posthumously.