Baseball cap

A baseball cap was a type of hat primarily worn by players and fans of baseball before being adopted into general fashion on Earth.

Jerome Weismuller, a CIA agent working in Wales in 1959, wore a baseball cap and jacket with the logo of the New York Yankees. (TV: Delta and the Bannermen)

In 2009 Gwen Cooper thought baseball caps would be popular with teenagers, but at that time they were starting to go out of fashion. (PROSE: The Wrong Hands)

Queenie Tilbury wore a green baseball cap when she delivered what appeared to be a birthday present to Theo Possible. (COMIC: The Train in Vain and the Junkmail Messiah)