The Libero (1999-) - A Defensive, Serve-Returning Specialist in Indoor Volleyball

[DonRocks]

Here's how much I knew: I found out today that since 1999, indoor volleyball has had a position called the Libero - a defensive specialist used for returning serves in the back row: Good servers were serving too many aces against 6'6" spikers when they rotated to the back, so this position was created.

Aug 16, 2017 - "The Libero in Volleyball: A Defensive Specialist" by Beverly Oden on thoughtco.com

This is an argument against trickle-down anything: It took almost twenty years for this bit of knowledge to trickle down to me.