Iso Joe has been straight-up KILLIN' IT in the BIG3 this season ... and his old employer has taken notice, 'cause Ice Cube tells TMZ Sports NBA scouts have been coming to watch Joe Johnson!!
The ex-NBA star was just named the 3-on-3 league's MVP ... and it was an absolute no-brainer. The guy led the league with 21.9 points a game and 3.9 assists a game for the Triplets.
Johnson was a helluva NBA player too ... he was a 7-time All-Star and, at one point in his 17-year career, averaged at least 20 points a game in 5 straight seasons.
We spoke with Cube about JJ's dominance in his league ... and he says it's gotten the attention of at least 2 NBA teams -- the Dallas Mavericks and New Orleans Pelicans.
As we previously reported ... Mavs owner Mark Cuban was front and center at the BIG3 Ballout in Dallas earlier this month ... and the dude must've liked what he saw.
So ... what happens if the Association steals his best player?? Cube ain't mad at all!!
"That's fine!" the rap legend says. "That's what it's all about. It's all about showing these guys can still play at a high level. And, if the NBA come calling, we're with that. We will definitely welcome that."
"Our players should go and play in the NBA if they can."
Cube also tells us who's on his bucket list for next year's lineup of players ... and there are some future Hall of Famers he's eyeing!!