Site of Fenway Park's Green Monster

• Out of __ (from nowhere)
• Position behind shortstop
• Where Why is, in "Who's on First?"
• The piece of ground in the outfield on the catcher's left
• OUT IN __
• Area patrolled by Jim Rice
• Symbol of remoteness
• Figuratively, whence some unexpected ideas

Wiktionary Word definitions in Wiktionary
a. From wikt:left field; off-the-wall