下か位い打だ線せん

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Meanings

1

noun

bottom of the batting order

baseball

Baseball term referring to the lower part of the batting lineup, typically batters 7 through 9.

line, track

上じょう位い打だ線せん
上位打線 refers to the top of the batting order (batters 1–3), while 下位打線 is the bottom (batters 7–9).
クリーンナップ
クリーンナップ is the heart of the order (batters 3–5), distinct from the bottom of the order.

Compound of 下位 (lower rank) and 打線 (batting lineup).