Mike Zimmer delivered a heartfelt message to Marshawn Kneeland in their final conversation before Thursday’s shocking news of the 24-year-old Cowboys defensive end’s death by suicide . The ex-Cowboys defensive coordinator, who held the position during Kneeland’s rookie season in 2024, told the former second-round pick to “keep being you” in their last discussion, according to NFL Network’s Jane Slater. “He was a great person, eager to learn .. wanted to be great. He didn’t take any crap from