Definition
A 'roller' is a batted baseball that travels along the ground, usually slowly. Think of it like a gentle giant, moving without much effort. It's not a screaming line drive or a towering fly ball, but rather a ground ball that hugs the earth. Unlike a sharply hit grounder, a roller gives the fielder more time to react. It's the opposite of a ball that zooms past you; it's a slow, deliberate challenge. Imagine it's like a chilled-out tortoise in a race against a speedy hare.