Hey Bill you can obtain free agents or make line up changes all the way up to last game on Monday night. Only thing is if you do then you must be able to have someone on your roster to drop who hasn’t played yet in that week and same for picking someone up. For example if you had one player left on Sunday or Monday night and you find out they are not playing, chances are most your others players have already played earlier, thus they wouldn’t be eligible to drop. In Dave’s case he had both McCaffrey and Mason already on his roster so he benched McCaffrey at 7:00 before kickoff and put Mason in. Owners can go under League, and then transactions and see who got what free agents and even see lineup changes. Computer won’t let you do an illegal lineup change or free agent drop or pickups. Hope this helps.