"GUARANTEEEEEED!!!!"
LaVar Ball says there's NO DOUBT in his mind his son, LaMelo, will receive the highest honors of his draft class ... telling TMZ Sports the #3 overall pick is a shoo-in for the Rookie of the Year award.
We spoke with Papa Ball at his family's Thanksgiving giveaway in South Central L.A. on Tuesday ... and in pure LaVar fashion, he made another bold prediction.
"Teaming up with Michael Jordan and you can't get rookie of the year?? Are you crazy?