The Bucks have made a trade for Bucks forward Jabari, according to league sources.
It was not clear how the deal would be structured.
The Bucks acquired Parker from the Brooklyn Nets for guard Beno Udrih.
Parker is averaging 17.4 points and 5.2 rebounds in 35.7 minutes per game.
The Nets, who also acquired guard Brandon Jennings, center Joe Johnson and two second-round picks from the Knicks, have also dealt for Parker.
The Pistons, who traded guard Luke Kennard and two first-round draft picks to the Bucks for Parker, guard Rodney Stuckey and guard Tyshawn Taylor, also have made deals for Parker in the past week.