His book A Season on the Brink chronicles a year in the life of the Indiana University basketball team and its coach, Bob Knight.

Feinstein has also written a sports-mystery series for young adults in which main characters Stevie Thomas and Susan Carol Anderson are reporting on major sporting events including the Final Four, US Open (tennis), Super Bowl, World Series, the Army–Navy Game, and the Summer Olympics.

During its original airing on ESPN on March 10, 2002, the film was presented uncensored for profanity, while a censored version was simulcast on ESPN2.

It is about the life and final days of Tom Watson's caddy, Bruce Edwards, who was diagnosed with ALS (also known as Lou Gehrig's Disease.)

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.