Just got it to work. Thanks Gordo, rosters are pretty good. Here's what I did: opened mvp 15 total conversion by kyleb in 7zip (the download comes in the form of an explodeme.exe to edit it, right click>7zip drop down menu>open archive). Afterwards, I deleted the data/database .dat files from the explodeme.exe and replaced them with these files. Afterwards I ran explodeme.exe (of course directing it to my mvp folder). Then i played the game and the rosters are updated. Good work Gordo!
I'm personally new to modding MVP games on PC, so please tell me if I did anything wrong or if there is anything I need to change (and sorry for any stupid mistakes I may have made). Here is what I did: I deleted the 19 dat files from data/database. Then I selected the files from the rar and dragged + dropped them into data/database. Also tried automatically extracting using 7zip. Both methods resulted in an unchanged roster (Zobrist, Kasmir, and Clippard still in Oakland, etc.) The last time and only time I had updated MVP was when the 1st version of MVP 15 came out.