In/out means on the field in your normal positions. Otherwise the coach would say we don't get on the infield during pregame. I've never seen a high school that did not take in/out on the field in positions unless the field was wet or real short on time. Travel is different. Unless it is a true showcase game just for show nobody takes in/out or infield/outfield on the field.
I understand the error in my logic now, but do you see how I could be confused at the phrase? My assumption was that the outfield is technically "on the field" and we usually take our in/outs in the outfield. I guess I'm just trying to justify my bad logic. But do you see how someone could make that mistake?