These look like a mouth guard used in sports.

It just hasn't been used in sports for very long.

A round object which is used in sports and games.

This phrase is used in other sports as well.

The coach's box is a term used in numerous sports.

Smack talk is also a slang term used in sports.

We're clearly of a mind that disagrees with drugs being used in sports.

They are also used as draft animals and in certain sports.

Dead heat, a common expression used in horse racing and other sports to describe a tie.

The term is predominantly used in politics, sports and pop music.