Looks more like some weather damage (wind and sunburn), did you harden them off before planting out. I'll let some of the more experienced chime in though, but I don't think it is disease quite yet.

Yeah, could be burn. Could also be pest. Do the spots start off looking water-soaked or bruised, or do thin areas and holes show up suddenly? If the damage appears suddenly without looking "soft" or water-soaked first, I would guess it's physical damage from the elements or pests.

Pretty sure it's not drought, though.

Based on the photos I wouldn't call it either, especially not drought. Just environmental damage. I would remove those leaves from the plants however and continue to monitor them.

Dave

Ok thanks