Little Problem here.

Im using the TUP 11 Mod, I'm in the middle of a dynasty now, It's a Fantasy Draft. so here's the problem, I want Iverson to be a free agent on my dynasty, but he is not in any team roster, is it possible to put iverson to an existing dynasty file? How? Thank you in advance.

Open players.dbf in your roster and change his team to 50.

Open players.dbf in your roster and change his team to 50.

I've tried that but unfortunately Allen Iverson is not in the Players.dbf of my dynasty.
What should i do?

if you see iverson on your save roster file which is TUP as you said, you can copy his player and appearance DBF to your dynasty. and make his team 50.

note: you might get crash problem by just adding him to your dynasty save file i suggest you better replace player rather than add players.