I could be wrong but I don't think the roster expands until they move to the 17 game season. The real change I know that will be implemented this year is the expansion of the active gameday roster by 2 players and the requirement that at least one of those 2 is an o-lineman. Normally teams only carry 8 o-line as they activate 7 on gamedays. This means all o-line will be active on gamedays or they will now carry 9 on the active roster.
Because of the truncated season and the fact they may be playing games without spectators, the word I'm hearing is that the NFL is considering that the roster changes won't take effect until next year. I think everything is in flux and the teams might not want to spend the money on expanded rosters if they won't have fans in the stadium. That's millions of dollars they won't get each week. So I'm going by the normal 53 until they finalize what is going to happen.
