Thrower (noun)

A person or device that throws something.

Origin:

Late middle english: from throw + -er.

Examples:

1. She was a skilled thrower and could hit a target from far away.
2. He was a thrower in track and field and specialized in the javelin.
3. The thrower was able to launch the discus farther than anyone else.
4. The pitcher was considered one of the best throwers in the league.
5. The thrower machine was used to launch the ball in the game.