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Dak Prescott opened up on the death of his teammate, Marshawn Kneeland , on Thursday ... saying he wishes the 24-year-old "didn't have to go through what he went through."

The Dallas Cowboys quarterback addressed the tragedy at a field dedication ceremony at his alma mater, Haughton High School in Louisiana ... admitting it was a "very tough day" for him.

"Tragic loss," Prescott said. "I hurt. Heavy, heavy heart today. I hurt for Marshawn, I hurt for his family, I hurt for his girlfriend. I hurt for every single one of my teammates. It's just a pain that you don't wish upon anybody. You wish none of us had to go through this."

Prescott added it's a reminder to appreciate every moment ... and never take anything for granted. Gallery Launch Gallery Getty

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