farm league

Noun

broadly

(baseball) One or more minor league teams owned by a baseball franchise and used as a training and testing ground for rookies, who, if they perform well, move on to play in the main major league team.

Japanese Meaning

野球において、メジャーリーグのチームが若手選手の育成と評価のために所有するマイナーリーグのチーム群

What is this buttons?

The rookie spent the entire season in the farm league before earning a spot on the major league roster.

Google Translation / DeepL Translation

その新人選手は、メジャーのロースター入りを勝ち取る前に、1シーズンまるまる下部組織で過ごした。

Details

Sense（1）

Details

Sense（2）

(sports, by extension) A minor league team from which scouts recruit players for the major league.

Now the CEO of Isiah International Inc. has his sights set on nothing short of establishing an official farm league for the NBA, establishing a system similar to the one which currently operates in Major League Baseball.

Google Translation / DeepL Translation