I recently transplanted these outside to my garden and the spots/streaks started up. This was about 2 days ago. I did acclimate them to the sun and the outdoors so I'm not sure what's causing this. Is it dangerous or natural, and also what is causing it?
When you water your tomato plants, try not to get the leaves wet. Fuzzy-leaves plants like tomatoes have hairs on the leaves that will catch and hold droplets of water. The droplets can focus the sunlight (like a magnifying glass) and cause leaf damage.
I can't say for certain that's your issue, but it would be consistent with the size of the damaged spots.