The key word is "Toiletry-type aerosols" allowed in checked bags. Depends who is checking whether sunscreen will pass for that.
I took a 5.5 oz aerosol container of sunscreen in November without incident and also a 6.5 oz aerosol of insect repellent in the same checked bag. They were double bagged in a zip-loc bag and packed with clothing. No problem and seems pretty clear to me, at least according to the TSA.
Does this link below make it clear?
TSA SUNSCREEN
