Abother picture to show overall health of the plant is seemingly good

It looks to me like the middle leaf may have been burned by cold temperatures. In my experience, setting out my plants too early without enough hardening off resulted in that kind of damage.

The other damage looks a lot like Flea Beetle damage. Flea Beetles will eat tiny holes in the leaves, like you see here, but rarely will cause catastrophic damage unless they're numbers are out of control. If you see little, round, black insects on the leaves, those are the culprits. They'll jump away as soon as they sense danger, and are tough to control with chemicals. But you can catch them if you're fast enough with your fingers. I just tend to try and catch/crush them whenever I see one. Again, the damage won't kill the plant, but it can make the plant slightly more susceptible to disease.

I hope that helped!

Helpful-thanks! After reading up on flea beetles, I believe you are spot on. The plants looked better today overall and are showing new growth already, so I'll simply observe for now. Have you tried DE before for this critter?

Not really sure what you mean by "DE," so it's probable that I haven't tried it. Is it a kind of pesticide?

DE is diatomaceous earth. It kills soft bodied insects tat come in contact with it. It's not very effective against hard bodied flea beetles who jump around. As tomahtohs said, flea beetles don't do a lot of damage to healthy plants, although in large numbers they can weaken them. If you want something organic to deal with them, consider spinosad or neem oil.