NBA 2K12 Official Roster Update: June 27, 2012
(PC, XBOX 360 and PS3)
NBA 2K12 Roster Update (No Injured Players) Latest
NBA2K12 Official Roster Updates with no injured players
(Dwight Howard, Derrick Rose and more players)

2K Sports has released the new official roster update for NBA2K12. In this Roster, players like Dwight Howard and Derrick Rose are not in the reserve list. It means you can use them in game without making any changes on team lineups. This roster is accurate as of June 27, 2012.

NBA 2K12 PC users: Download the Roster file below and Paste it in your "Saves" folder. Follow the instructions or else it will not work.
Xbox 360 and PS3 users: The update will download and apply automatically if your gaming console is connected to the Internet. Another way is using the reset roster (doesn't work for PC) under the options menu or go to 2K Share and download the official update.

Note: You need to open NBA 2K12 game and go to Main menu > Options > Load / Save > Select "Roster" after copying the Roster.ROS into your "Saves" folder for changes to take effect.

How to find Saves folder?
Windows 7 and Windows Vista:
It's located at "C:\Users\Username\AppData\Roaming\2K Sports\NBA 2K12\Saves" You can find it by opening the Start Menu then type %Appdata% in the search pane then Open 2K Sports > NBA 2K12 > Saves.

Windows XP users:
It's located at "C:\Documents and Settings\Username\Application Data\2K Sports\NBA 2K12\SavesOpen "Run> type %Appdata% then press Enter and Open 2K Sports > NBA 2K12 > Saves.

NBA 2K12 gamers: Make sure to install the latest NBA 2K12 Online Data to avoid glitches like white shoes and white jerseys. To fix the Rookie Black Arms, Download the fix and paste the files in your NBA 2K12 game / main folder located at "C:\Program Files\2K Sports\NBA 2K12" (Depends where you installed the game) You can right click the NBA2K12 desktop shortcut and select "Open folder location".

1. Download the Roster.
2. Copy Roster.ROS and paste it in your "Saves" folder.
3. Play NBA2K12 and go to Main menu > Options > Load / Save > Select "Roster"

It seems like that this is going to be the final official roster for NBA 2K12 but 
always check NBA2K.ORG for future updates and news about NBA 2K Series.