Dak Prescott's plant leg just got a whole lot better lookin' -- TMZ Sports has learned the Dallas Cowboys superstar got it tatted over the weekend ... with tributes to his mom, brother, Kobe Bryant and more.
The quarterback hit up Andres Ortega out at Onder Ink in Arizona just days after his star wide receiver, CeeDee Lamb, got a back piece done by the artist -- and Prescott came away from the shop with a massive new tattoo.