libero

US /ˈliː.bə.roʊ/
UK /ˈliː.bə.roʊ/
"libero" picture
1.

a defensive player in volleyball who is restricted to the back row and wears a different colored jersey

:
The libero made an incredible save, keeping the ball in play.
A good libero is essential for a strong defense.
2.

a player in soccer (football) who is not assigned a fixed position and can roam freely to support both defense and attack

:
Franz Beckenbauer was famous for his role as a libero.
The coach decided to play with a libero to add flexibility to the team's formation.