It’s hard to know what it might be, as there are several things that can cause large brown spots on fruit. However, I’m wondering if it might have been anthracnose; for more information about this disease, see: http://www.almanac.com/pest/anthracnose and this article from the Ohio Cooperative Extension:
http://www.oardc.ohio-state.edu/sallymiller/Extension%20Outreach/information%20transfer/Factsheets/Vegetable/Anthracnosepepper.pdf
which shows you a picture of it on bell pepper fruit.
Some other possibilities might include:
blossom end rot: http://www.almanac.com/pest/blossom-end-rot
http://extension.uga.edu/publications/detail.cfm?number=C938
sunscald: http://msue.anr.msu.edu/news/hot_and_sunny_days_promote_sunscald_in_peppers_and_other_vegetables
It’s hard to know what it might be, as there are several things that can cause large brown spots on fruit. However, I’m wondering if it might have been anthracnose; for more information about this disease, see: http://www.almanac.com/pest/anthracnose and this article from the Ohio Cooperative Extension:
http://www.oardc.ohio-state.edu/sallymiller/Extension%20Outreach/information%20transfer/Factsheets/Vegetable/Anthracnosepepper.pdf
which shows you a picture of it on bell pepper fruit.
Some other possibilities might include:
blossom end rot: http://www.almanac.com/pest/blossom-end-rot
http://extension.uga.edu/publications/detail.cfm?number=C938
sunscald: http://msue.anr.msu.edu/news/hot_and_sunny_days_promote_sunscald_in_peppers_and_other_vegetables
Hope this helps!