UFC 2009 Undisputed patch on the way
There are a number of issues regarding online play of UFC 2009 Undisputed which the game's developers are currently working to resolve. The most notable issue for many players is when a losing player disconnects before a match has finished, they have robbed their opponent of a rightful victory with no repercussions to the loser.
This will be remedied with the patch where by the disconnecting player will record a loss as well as a DNF on their profile on the fighter selection screen of the Online Ranked Match. Players who incur a DNF will also have their winning streak reset to zero.
For PS3 users the patch includes a fix for a bug that causes freezing during auto-save.
Source: http://www.joystiq.com/2009/07/08/ufc-2009-undisputed-patch-incoming/