Questions about example sentences with, and the definition and usage of "Homerun"

A: Not a phrase.

Homerun is when you hit the ball out of the park in baseball

Fielder should be combined with in- or out- to designate a part of the baseball field, for example outfielder

There is a player with the last name Fielder so it may mean he scored a homerun if you heard it in a game with him

A: "If there's a homerun, they can turn the game around." or "If there's a homerun, they can make a comeback."