To load the new rosters, use the Reset Roster function under the Options menu or go to NBA 2K13 main menu > "Options" > "Load / Save" > "Load" > Load Roster file.
Follow the steps below:
- Open Start Menu or press windows key + R.
- Type %AppData% in the search bar.
- Open 2K Sports folder > NBA 2K13 > Saves or follow this path C:\Users\X\AppData\2K Sports\NBA 2K13\Saves Don't forget to replace the X with your windows username.