Tragic news for Dak Prescott and his family ... the quarterback's older brother, Jace Prescott, died suddenly at 31 years old on Thursday, the Dallas Cowboys announced.
No cause of death was given.
Dak had been super close with Jace, the oldest of the Prescott brothers ... and had even just filmed a national Campbell's Chunky Soup commercial with him in 2019.
At the time, Dak said Jace and his other older brother, Tad, meant the world to him ... especially after he tragically lost his mom to cancer in 2013.