Three-I League

Proper noun

US historical colloquial

(US, baseball, historical) A Minor League Baseball organization that operated mainly in Illinois, Indiana, and Iowa.

Japanese Meaning

（米国野球・歴史）イリノイ州、インディアナ州、アイオワ州を中心に活動していたマイナー・リーグ野球組織

Several future major leaguers honed their skills in the Three-I League before being called up.

後にメジャーリーガーになった選手の何人かは、イリノイ・インディアナ・アイオワ・リーグで腕を磨いてから昇格した。

Sense（1）

(US, baseball, historical) A Minor League Baseball organization that operated mainly in Illinois, Indiana, and Iowa.

Sense（2）

(US, politics, colloquial) People of Irish, Italian, and Israeli descent, constituting three important minority groups in the United States.

the Three-I League

（ canonical ）