[7] On April 25, 2017, Tanner Richard left the Syracuse Crunch to join the Switzerland men's national ice hockey team to try to earn a spot for the 2017 IIHF World Championship.
[8] On April 28, 2017, Richard agreed to a two-year contract with Genève-Servette HC of the Swiss National League A (NLA).
[13] On May 31, 2017, the Lightning announced it had traded Bokondji Imama to the Los Angeles Kings in exchange for a conditional seventh-round pick in the 2018 NHL Entry Draft.
[14] The Kings satisfied the requirements of the conditional seventh-round pick when it signed Imama to a three-year, entry-level contract.
[17] Sergachev also helped Windsor capture the 2017 Memorial Cup as Canadian Hockey League (CHL) champions.
The Lightning chose to protect forwards Steven Stamkos, Nikita Kucherov, Ryan Callahan, Tyler Johnson, Ondrej Palat, Alex Killorn, Vladislav Namestnikov; defensemen Victor Hedman, Anton Stralman and Braydon Coburn; and goaltender Andrei Vasilevskiy.
[19] On June 19, 2017, Jokerit of the Kontinental Hockey League (KHL) announced it had signed Lightning forward prospect Henri Ikonen to a two-year contract.
[20] On June 20, 2017, Lausanne HC of the NLA announced it had signed Lightning prospect Joel Vermin to a five-year contract that contains an NHL clause for a one-way deal.
[21] On June 21, 2017, the Vegas Golden Knights selected Lightning defensemen Jason Garrison in the 2017 NHL Expansion Draft.
[24] On June 25, 2017, the Lightning announced the schedule and tentative roster for their annual developmental cap at The Ice Sports Forum.
Notable prospects attending this year includes Mikhail Sergachev, Brett Howden, Anthony Cirelli, Mathieu Joseph, Taylor Raddysh and Conner Ingram.
[28] Later in the afternoon, the Lightning announced it had issued qualifying offers to nine players: Michael Bournival, Jake Dotchin, Kristers Gudlevskis, Tyler Johnson, Tye McGinn, Ondrej Palat, Matthew Peca and Tanner Richard.
Notable players not being issued qualifying offers by the Lightning were prospects Dylan Blujus, Jonathan Racine and Henri Ikonen.
[39] The Lightning acquired forward Carter Verhaeghe from the New York Islanders in exchange for goaltender Kristers Gudlevskis.
[47] The Lightning announced the free agent signing of defenseman Dan Girardi to a two-year contract valued at $3 million per season.
[48] The final signing announced by the Lightning was free agent left wing Chris Kunitz to a one-year contract was worth $2 million.
[49] On July 10, 2017, the Lightning announced it had re-signed restricted free agent forward Tyler Johnson to a seven-year, $35 million contract extension.
[50] On July 14, 2017, the Lightning announced the re-signing of restricted free agent forward Ondrej Palat to a five-year, $26.5 million contract extension.
Prospects of note in attendance are Brett Howden, Callan Foote, Mikhail Sergachev, Taylor Raddysh, and Anthony Cirelli.
[58] The Lightning opted to play the Nashville Predators' prospects in a series of scrimmages over three days at Ford Ice Center in Antioch, Tennessee.
Otto Somppi was assigned to the Quebec Major Junior Hockey League (QMJHL)'s Halifax Mooseheads.
Alex Gallant, Carter Verhaghe, Mat Bodie, Matthew Spencer, Connor Ingram and Michael Leighton were assigned to the Syracuse Crunch.
The retirement ceremony will take place before the game against the Los Angeles Kings, the club Lecavalier finished his career with.
Former first round pick Brett Howden was assigned to his junior club in the WHL, while Anthony Cirelli, Adam Erne, Mathieu Joseph, Tye McGinn, Matthew Peca, Mitchell Stephens, Dennis Yan, Erik Cernak, Jamie McBain, Ben Thomas and Daniel Walcott were reassigned to Syracuse.
[67] On September 28, 2017, the Lightning announced it had signed forward prospect Alexy Lipanov to a three-year, entry-level contract.
The forward group consisted of J. T. Brown, Ryan Callahan, Gabriel Dumont, Yanni Gourde, Tyler Johnson, Alex Killorn, Nikita Kucherov, Chris Kunitz, Vladislav Namestnikov, Ondrej Palat, Cedric Paquette, Brayden Point and Steven Stamkos.
The defensemen on the opening night roster were Braydon Coburn, Jake Dotchin, Dan Girardi, Victor Hedman, Slater Koekkoek, Mikhail Sergachev, Anton Stralman and Andrej Sustr.
[73][74] Forwards Michael Bournival, Erik Condra, Jonne Tammela, Carter Verhaeghe and defenseman Dominik Masin remained with the team on injured reserve.
Below are the Tampa Bay Lightning' selections at the 2017 NHL Entry Draft, which was held on June 23 and 24, 2017, at the United Center in Chicago, Illinois.