Left Field Meaning

(idiomatic) An unusual or unexpected position, or a viewpoint held by very few others in contrast to the majority viewpoint (especially in the phrases out in left field and way out in left field)

Example:   Some of her comments really came from left field. I have no idea what she was thinking.
1960[1], Journal of business education, volume 35, page 303:
  Tonne is way out in left field if he thinks a voice writing machine will never be built or that there are no existing prototypes or work being done in this ...