Two seasons at Frölunda HC in the Swedish top flight and one with HC Sochi of the KHL caught L.A.'s attention.
Following a rookie North American pro baptism which saw him split time between the Kings (27 games) and AHL Ontario Reign (25 starts), Fantenberg seemed to have found a home at the Staples Center this winter, suiting up for 46 games in black-and-silver.
"My first year in the league coming from Europe was a little bit of an adjustment," he acknowledged. "So it was up and down the first part, but finished off with a good playoff series and I think that got me excited for this year.
"I've been more solid, more reliable this season. Playing on a higher level. I haven't had those dips. So it's been a good year for me, especially the last couple of weeks, even if the team has been struggling."
And Fantenberg will join his new pals in the New York area enjoying a certain degree of familiarity in his surroundings. Pivot Mikael Backlund, for instance, was a Tre Kroner teammate at the 2016 World Championships in Russia.
"I know them all a bit, actually. Mikael, as you mentioned. I played against Rasmus (Andersson) and Oliver (Kjillington) last year in the minors and against Elias (Lindholm) back in the Swedish Elite League.
"That always helps a little bit, when you make a change, already knowing guys on the team.
"I'll be going to New York to meet the team. A good trip. Nothing too crazy.
"I'd rather meet the guys right away and meet the staff. I think that's the best thing to do."
Even with his presence at the Kings-Bolts tilt at Amelie Arena now a non-starter, Fantenberg wasn't planing on catching any additional Zs Monday.
"Not after you get a call like that …
"I'm wide awake now."