"That’s how I got to where I am,” she says. Claressa Shields and Ryan Destiny, the Detroit-born actress who plays her, attend the Los Angeles premiere of ''The Fire Inside'' on Dec. 4.

"What you think about girls' boxing?" The man asking that is Jason Crutchfield (Brian Tyree Henry), the coach of a boys' boxing club in Flint, Michigan. It's 2012, and five years before he'd ...