No. He's normally (without any injuries) the 10th man of Maccabi. But luckily for him one of their main players, Shawn James, got injured earlier this season, and was knocked out for the remainder of the season.
So that bumped him up the the 9th man, and gave him a lot more playing time.
Still, the 9th man of the team isn't all the great.
Nonetheless, he got a Euroleague title as a rotation player.
And regardless of what all the moronic NBA only fans in the world say, anywhere in any country in the world they might be in, every single rotation player on the top Euroleague teams is an NBA rotation player.
And the people that say otherwise are total clowns that do not know a thing about basketball.
So no, he's not a key player for Maccabi, he's actually their least important rotation player. But the fact is that simply being a main rotation player in a big Euroleague club automatically means you can be an NBA rotation player.
Because no one can make it in those biggest Euroleague club's rotations unless they are at that level, and it's simply ludicrous nonsense whenever anyone says otherwise. That's how high the level is in the biggest European clubs.