Looks like bird damage. Home Depot, Lowes, and others sell netting that will help.

I was also going to say birds. What he said about netting. And if the tomato will ripen without going bad, I would cut out the pecked spot and still eat it.

Birds devoured my tomato crop last year. I was told the birds are doing this for water. I supplied water, they kept pecking. I put netting over the top and they still came through the sides of the fence. I tried hanging CDs and pie pans. Still did not stop them. You will have to completely cover with netting. I've moved since and I hope they don't have an appetite for Tom. this year. Never had a problem with this in GA only when I moved down to the coast.