Updating Madden 09 Rosters on Xbox 360 Without Xbox Live
Not Possible Officially
Madden NFL 09 on Xbox 360 requires Xbox Live to download official roster updates. The game lacks:
Offline roster editing tools
Ability to import custom roster files from USB
Any built-in mechanism to update rosters without the Live service
Workarounds (Limited)
Community Roster Files: Some forums (e.g., Operation Sports) host user-created roster files for use with a modded/JTAG/RGH console. High risk: Modding violates ToS, bans console from Live, and files may contain malware.
Play Offline with Original Rosters: Accept the 2008/2009 season rosters as a "time capsule" experience.
Better Alternatives
Upgrade to a Newer Madden: Madden 12+ on 360/PS3, or any current-gen version, includes deep offline franchise modes with full roster editing, custom draft classes, and commissioner tools.
PC Mods: Madden 08 on PC has a massive modding community (uniforms, rosters, stadiums, physics) that keeps it playable today.
If you must have updated rosters on 360, an Xbox Live Gold subscription is the only safe, supported method.