's got another one ... not a rap hit ... but another huge athlete for his Young Money APAA Sports & Entertainment Agency, this time signing a champion boxer to the team ... TMZ Sports has learned.
Wayne's new kid ain't some no-name prospect, itsErickson Lubin who's 18-0 and about to fight for the super welterweight championship of the world.
Lubin is fighting champion Jermell Charlo at the Barclays Center on October 14 and recently struck a pose with Young Money president Mack Maine, the guy responsible for bringing him to the team.