New York Jets assistant coach Greg Knapp has died following bicycle crash Getty Images By Jacob Lev, CNN New York Jets assistant coach Greg Knapp has died, five days after being involved in a bicycling crash, the Knapp family announced on Thursday. He was 58. Nicknamed “Knapper,” he “was called back home to Heaven, where he will be reunited with his Dad,” the family said in a statement. “Those of us who were so blessed to have known him, know that he would have wanted even this moment to be a teachable one,” the statement says. “So this is it…’Live every day as if it’s your last, and love those around you like it won’t last!'”