He is the latest high-level acquisition for the Devils, who this offseason added defenseman P.K. Subban in a trade, forward Wayne Simmonds as a free agent, and center Jack Hughes with the No. 1 pick in the 2019 draft. Fitzgerald said there may be more to come.
"I would say this is this big cherry on top, but you never know," Fitzgerald said. "We still have (cap) space, and you never know what presents itself with the other teams out there that may call our organization. Right now, we're really happy where we're at."
Gusev was selected by the Tampa Bay Lightning in the seventh round (No. 202) of the 2012 NHL Draft and was traded to the Golden Knights for two draft picks on June 21, 2017, the day of the NHL Expansion Draft. He helped the Olympic Athletes from Russia win the gold medal at the 2018 PyeongChang Olympics and was named Best Forward after leading the tournament with 12 points (four goals, eight assists) in six games.
"He's a darter, he's got extremely high hockey sense," Fitzgerald said "He thinks the game really well and he can shoot the puck, he really can make the plays. He plays the off-wing and that's fine by us. But he works, he competes and he hunts pucks. He can get in the holes and finds a space to get a shots off. So we think that translates into production."
NHL.com staff writer Mike G. Morreale contributed to this report