Volleyball

The player who is not allowed to attack the opponent’s field is the Libero.

An excerpt from the article 20 facts about volleyball

He has a shirt of a different color than the rest of the team and his activity is limited to accepting a play and defense. The position of libero was introduced only in 1998 to diversify the games. The debut of players in this position took place at the 1998 men’s and women’s world championships in Japan.