- Wasn’t Casey Affleck supposed to play the lead?

- He really wanted to, but at that time I couldn’t sell him to Walden. Interestingly, I saw Casey at one of the recent awards shows. We hugged, and then he turns to [Manchester by the Sea writer-director] Kenny Lonergan and goes, “This guy didn’t want me in his movie.” Casey was and is an exceptional actor, but he needed something like Manchester to put him over the top commercially.
—  Bill Mechanic, ‘Hacksaw Ridge’ producer (source)