Now, we've spoken with three other major fighters who have also been contacted by Roc Nation ... more evidence that Jay is dead serious about making a splash in the boxing world.
The fighters -- who wished not to be named -- tell us that just like Broner's courting, Jay Z never personally reached out ... sending his people to make contact instead and we're told it rubbed the fighters the wrong way.
All three fighters we spoke with tell us they ultimately turned down the Roc Nation offers ... but aren't closing the door on a possible relationship with RNS in the future.
Meantime, Roc Nation Sports is still growing like crazy ... and recently signed Georgia running back Todd Gurley who's expected to be one of the first running backs selected in the NFL Draft.
We reached out to Roc Nation Sports for comment -- so far, no word back.