Yes they have indoor fields.
There is about 120 different ones.
About 37,813 US NFL football fields.
About 105 (105.876124933827422) US NFL football fields.
About 32 (31.76283748) US NFL fields.
About four (3.78129) US NFL football fields.
266,492 US, NFL fields with some room left over.
4,132,187 US, NFL fields would fit in that area.
NFL player Brandon Fields played for Michigan State.
NFL player Brandon Fields weighs 249 pounds.
NFL player Carlos Fields weighs 238 pounds.
NFL player Carlos Fields played for Winston-Salem State.