Looking at the law now, unless Mervin has held a green card five years in advance of whenever the IOC requires athletes to be citizens of their country, and has been continually residing in the United States in those five years, and at least lives in the address in which he is using on his naturalization application for some time (I think 3 months), he won't have U.S. citizenship for 2022 either. I understand he wants to train in Montreal and Marissa was ok with that because she felt she didn't need to go to another Olympics at the time, but if they are actively seeking citizenship now because they changed their mind on that, I fear it's already too late for 2022.