Cowboys quarterback Dak Prescott mourned teammate Marshawn Kneeland’s death, saying he's carrying a “heavy, heavy heart" for all who loved him.

Marshawn Kneeland, a defensive end for the Dallas Cowboys, died early Thursday, apparently from a self-inflicted gunshot wound following a police chase, law enforcement officials said.

“That’s why I think we all should be careful about what we say to people. I think we should be careful about what we tweet about people. I think we should be cognizant of what everyone’s going throug...