John Feinstein is an American sportswriter, author and sports commentator. Feinstein was born to a Jewish family in New York City on July 28, 1956. His father was heavily involved in the arts having been the General Manager of the Washington National Opera from 1980 to 1995 and was also the first Executive Director of the Kennedy Center in Washington D.C. 

John Feinstein has written 42 books. His most famous sports book, "A Season on the Brink" chronicles a year in the life of the Indiana University basketball team and its coach, Bob Knight. In 1995, he authored a best seller, "A Good Walk Spoiled," about a year on the PGA Tour as told through the stories of 17 players. A Season on the Brink was adapted to film with an ESPN production of the same title. The film was presented with raw, uncensored for profanity, giving the movie a very realistic feel. Feinstein's book Caddy for Life: The Bruce Edwards Story was released in 2004. It is about the life and final days of Tom Watson's caddy, Bruce Edwards, who was diagnosed with ALS. Feinstein and long-time friend Terry Hanson engaged the William Morris Agency and commissioned a screenplay in conjunction with Matt Damon's and Ben Affleck's production company, LivePlanet. 

On March 8, 2012, Feinstein joined SiriusXM's Mad Dog Sports Radio channel, teaming up with Bruce Murray for the sports talk show, Beyond the Brink. However, Feinstein soon left the show, as he was offered a slot of his own show on the brand new CBS Sports Radio.