The Masters would finish on Monday and not run into the NFL window. As I mentioned elsewhere, they are up against a much earlier sunset in Augusta as the tournament is being played in November instead of April.
In fact the second round was suspended at around 4PM Friday due to darkness. They will resume at the 12th hole Saturday morning:
https://www.espn.com/golf/story/_/i...-justin-thomas-masters-leaders-play-suspended