レフト (refuto) means “left field” | MotiTan Japanese Dictionary

More examples

監督は守備の練習でレフトに選手を置きました。kan toku wa shu bi no ren shū de re fu to ni sen shu o o ki ma shi ta

The coach put a player in left field during fielding practice.

Refers to the part of the outfield on the batter's left, as well as the player who defends that position.

左翼sayoku: A baseball term for the outfield area on the batter's left and the player defending that area.

野球で、外野のうち打者から見て左側の区域、またはそこを守る選手。ya kyū de gai ya no u chi da sha ka ra mi te hidari gawa no ku iki ma ta wa so ko o mamo ru sen shu

The Japanese baseball term レフト (refuto) is borrowed from English left in the baseball sense of the left side of the outfield.

In American English, out of left field means unexpected or unconventional, extending this baseball position into an everyday expression.