Roman Gabriel, a star NFL quarterback who dabbled in acting and broadcasting post-football, has died. He was 83. Roman Gabriel III, the quarterback’s son, announced that his father died Saturday morning. He shared on social media: “I am sad to announce my father Roman Gabriel passed away peacefully this morning of natural causes at his home. The entire family asked for your prayers , and to please respect our privacy. I love you dad.” Long-time NFL fans know that Gabriel was the quarterback of the Los Angeles Rams during the 1960s. He ended his career with the Philadelphia Eagles. And along th…