Yes, Eric Stoltz Really Was Almost in 'Back to the Future

Which actor was cast as Marty McFly in Back to the Future before being let go and replaced by Michael J. Fox: Rob Lowe, Emilio Estevez, or Eric Stoltz? - Quora

Why Fan Response to the Back to the Future Sequels Changed

New Book Contends Eric Stoltz Was “Difficult” & The Cast Wasn't Shocked He Was Replaced On 'Back To The Future

Michael J Fox: 'Every step now is a frigging math problem, so I take it slow', Michael J Fox

Back to the Future the Musical is here — fire up the DeLorean

Reviews: Back to the Future - IMDb

Is there a full version of Back To The Future with Eric Stoltz or directors didn't let him shoot all the scenes? - Quora

The Real Reason Eric Stoltz Wasn't Marty McFly in 'Back to the Future' - IMDb

Eric Stoltz is Actually Still In Back To The Future!

How the Back to the Future Cast and Crew Knew Eric Stoltz Would Be Fired