This is the 3993rd most frequent Japanese word.
ダルビッシュ
"ダルビッシュ" refers to Yu Darvish, a Japanese professional baseball pitcher.
Here, 'ダルビッシュ' refers to the individual's name, Yu Darvish, as a proper noun within the sentence to describe him.
ダルビッシュはとても有名な野球選手です。
Darvish is a very famous baseball player.
In this sentence, 'ダルビッシュ' is used to specify who performed the action, attributing the activity of pitching to Darvish.
昨日の試合でダルビッシュが素晴らしいピッチングをしました。
In yesterday's game, Darvish pitched excellently.
Here, 'ダルビッシュ' serves as a reference to emulate or compare another's pitching style.