After being drafted by the Rams and spending a decade in Los Angeles, he was released and signed by
Bill Walsh and
John McVay as a veteran presence for the defense on a $1 million contract over five years. Reynolds' enthusiasm for football was such that he would show up at 49ers team breakfasts in full pads and eyeblack. Walsh said "He is consumed with football, even more than any addicted coach". Aside from his intensity, he was also known for being a studious player, turning up to his first training camp with the 49ers with his own projector so he could study film in his room, carrying around a large collection of pencils to take constant notes, and being the only player that the coaches entrusted with a key to the facilities. He also once refused to lend a pencil to then-rookie
safety Ronnie Lott, stating that he wouldn't become a success in the NFL until he brought his own pencil to every meeting. Lott was elected to the
Pro Football Hall of Fame after a 14-year career. Walsh credited Reynolds as being the most telling personnel move he ever made, stating "Jack gave us leadership and maturity and toughness and set an example for everybody...As strange a guy as he was, he really put us on the map. I think that single addition was the key to our success." It was a condition of his last professional contract that he would become a coach immediately after retirement. However, he only lasted 12 days, allegedly finding the candid nature of player assessments by fellow coaches "unsettling". He retired from professional football after the brief coaching stint. ==Personal life==