Know a story no one has told?

The coach who never gets the credit. The kid who trains before school. The trainer behind the champion. Tell us who they are. We'll find the story.

Photos via Wikimedia Commons: John Mac (CC BY-SA 4.0), Erik van Leeuwen (CC BY-SA 4.0), Estrogentildonna (public domain), theharv58 (CC BY 2.0).

Who is it?