In week 5 in my Franchise, I'm carrying 55 players--and I have been since preseason week 4, I can even show video proof in an upload if you need it.
I simmed to week 4 and picked up some players to test in the last preseason game, only to find a 65ovr WR and Ryan Clady out for the season. After cutting players and putting them on IR, I tried to make sure I had 53 active players, since a basement-level 7th WR was a special teams stud and Demaryius was out for 5 weeks. After this, I still had the 'Cut 2 Players' in my Things To Do.
But, after triple checking my roster, I just advanced to week 1 without addressing it and I've been able to carry the 2 IR players without a single problem so far. Looking to retest and see if anybody can confirm this as well or if mine was some sort of bug

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