League divisions that start on or after Friday end the Sunday a week later, so it's possible to have a high count at this point in the week if the division started on Friday or Saturday. That's said, that many trophies is also possible in a little over two days.
If you really feel another member is playing unfairly, you should directly report them and not post accusations publicly.
https://support.chess.com/en/articles/8562517-how-do-i-report-someone
So in my division theres someone called [removed -- MS](Division link: [removed]) and I think they might be cheating because there is no way you can humanly get 480 trophies in just a matter of 2 days. Also, most of his games are won and very little of them are lost or drawn. Most chess engines also very rarely lose or draw games.
[removed]
Not only that, out of their 589 TOTAL games they have drawn by agreement only TWO TIMES which is a very suspicious amount if you ask me.
Also they joined on November 17, 2024 which I think is a bit too early to get THAT many trophies and elo.