Yakovlev had seven points (two goals, five assists) in 25 games with New Jersey last season.
"We watched NHL highlights in [the] SKA dressing room all the time," Gusev said. "I also followed [former Toronto Maple Leafs defenseman] Igor Ozhiganov. And I like 10-minutes highlights where you can see much more details. ... So I followed guys and know [the] Devils pretty well."
Gusev has also spoken with Sergei Brylin, an assistant coach with Binghamton, New Jersey's American Hockey League affiliate, and is aware of the history the Devils have with Russian-born players.
"I talked to [Brylin], he said I can ask him for help," Gusev said. "... I know that [Alexander] Mogilny played [for the] Devils, also [Viacheslav] Fetisov, [Valeri] Zelepukin, [Ilya] Kovalchuk, [Alexei] Kasatonov. And Russians played there mostly successfully. It's really good that [the] Devils have good connections with Russians."
Selected by the Lightning in the seventh round (No. 202) of the 2012 NHL Draft, Gusev was traded to the Golden Knights for two draft picks on June 21, 2017, the day of the NHL Expansion Draft. He signed a one-year entry-level contract with Vegas on April 14 after he was named KHL MVP last season but did not play any games for the Golden Knights.
"No insult, absolutely," he said. "I'm even grateful for letting me go. I liked it there. Everyone was kind to me. I don't have any bad word on them."
NHL.com/ru senior editor Sergey Demidov contributed to this report