left field
The part of a baseball out-field to the batter's left.
Right-handed batters usually hit to left field.
left fielder
The player in baseball who plays in left field.
The scoreboard in the ball park is on the fence behind the left fielder.
out in left field
Far from the right answer; wrong; astray.
Johnny tried to answer the teacher's question but he was way out in left field.
Susan tried to guess what the surprise was but she was way out in left field.
Speaking or acting very queerly; crazy.
The girl next door was always queer, but after her father died, she was really out in left field and had to go to a hospital.