LaVar Ball is already clearing off space on Lonzo's trophy case -- telling TMZ Sports he expects FOUR CHAMPIONSHIPS now that LeBron James is on the Lakers!
"I called LeBron to L.A.," LaVar told us at a BBB pop-up shop at Sole Play in Atlanta ... "I knew he was coming to L.A., man! Everything lined up for me!"
But, what about the Golden State Warriors signing DeMarcus "Boogie" Cousins -- is LaVar concerned about the reigning NBA champs??
Hell no.
"The Warriors can sign Boogie, Prince, Michael Jordan ... anybody they want! They still ain't gonna win with this team right here -- the Lakers with LeBron!"
"You don't give my son the best player in the game and don't think he gonna win no championships!"
LaVar -- who's getting ready for his JBA basketball games Tuesday night -- says he's still confident the Lakers will eventually sign his other 2 sons to the team and guarantees championships when they get there!
"I'm trying to let y'all know!"