“Left” and “right” are defined from the perspective of the offense: Jayson Tatum drove down the left sideline; Mike Napoli uncorked a line drive to left field

Use two words, hyphenated, when referring to handedness as a noun or an adjective: a right-hander; the left-handed pitcher; a right-hand shot

Use two words, unhyphenated, when referring simply to the hand as a noun: He picked up the ball with his right hand.