Domingue, 26, appeared in 19 NHL games this season with the Lightning and Arizona Coyotes, posting a 7-9-1 record. He won seven of his 11 starts while with the Bolts, including four consecutive games from February 22 through March 18. Domingue made his Bolts debut on January 7 against the Detroit Red Wings, recording 34 saves in the Bolts' 5-2 victory. Domingue was acquired by the Lightning from Arizona on November 14, 2017 in exchange for goaltender Michael Leighton and forward Tye McGinn. He also made one appearance during the 2018 Stanley Cup Playoffs, making seven saves on seven shots on May 11 versus Washington.