Simon has twice fought for major world boxing titles. On March 13, 2009, he lost a unanimous decision to Arthur Abraham for the IBF middleweight title. On December 9, 2011, he lost by a first round knockout to Gennady Golovkin for the WBA (regular) middleweight title. Simon also holds a victory over Elvin Ayala in a regional (USBA) title fight.
- "Golovkin added to Klitschko Show on Dec 10, faces Lajuan Simon". Boxingnews24.com. 2011-11-23. Retrieved 2012-10-01.
- "Gennady Golovkin Flattens LaJuan Simon In One Round - Boxing News". Boxingscene.com. 2011-12-09. Retrieved 2012-10-01.
- "Sebastian Sylvester Vs Lajuan Simon". Fightwriter.com. 2009-06-25. Retrieved 2012-10-01.
- Dan RafaelBoxingArchive (2012-04-30). "Middleweight Gennady Golovkin set for 4th title defense - ESPN". Espn.go.com. Retrieved 2012-10-01.
- "Lajuan Simon". Boxnation.com. 1979-02-25. Retrieved 2012-10-01.
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