Are these in-ground or in containers? That point is a vital difference.

It can be either BER (blossom end rot) or lack of adequate pollination. From your description, most likely is BER which can be caused by either over-fertilization or inconsistent soil moisture levels. It is fairly common given the spring weather and once you can stabilize the soil moisture level - not too wet OR too day - it goes away.

There are FAQs here on both - just click the blue FAQ button at the top of the forum front page.

Dave

They are in the ground. I fertilized them Friday and it has rained at least once a day every day since. I guess I'll just leave them alone for a while and see what they do. Thanks.