Wrinkled / shriveled fruit?

[Troutslayer]

Hello all,

I have had a very bountiful tomato harvest thus far this year, it is hard to keep up. I recently noticed some of my tomatoes having soft, shriveled skin. Upon cutting them open they look mostly normal, but I am wondering what is causing this (See pictures)

They are in containers, have plenty of sun, and are watered with a soaker hose on a timer.

[Lindsaylew82]

How's the heat been? Sometimes if we get temps near or over 100, my tomatoes will literally boil in the skins, and then they look a lot like yours. Yours look like they have a little sun scald, too.