Download the Official LBL Graphics here.
Team Logos go into the LBL–>news–>html–>images–>team_logos folder.
League Logos go into the LBL–>news–>html–>images–>league_logos folder.
Jerseys go into the LBL–>jerseys folder.
Caps go into the LBL–>ballcaps folder.
You can find more information on how to save and store graphics in the OOTP Manual.