Cass Sigmon v Rene Torres - Boys superheavy continuous sparring - 2009 NBL Supergrands
Chris Walker v Cass Sigmon - World Team Challenge - 2009 Amerikick Int'ls
Rene Torres v Leon Jefferson - Boys superheavy continuous sparring - 2009 NBL Supergrands
Cass Sigmon v Daniel del Valle - Boys superheavy continuous sparring - 2009 NBL Supergrands
Jamal Albini v Cass Sigmon - Compete Nationals 2013 - Men's HW Grands
Cass Sigmon vs Hamed Firouzi Men's Semi Final Fighting at Ocean State Grand Nationals 2013
Leon Jefferson v Cass Sigmon - Boys team sparring eliminations - 2009 NBL Supergrands
SDHTFLYCONT5
Elias Arellano v Cass Sigmon - Boys team sparring eliminations - 2009 NBL Supergrands
Francisco Colorbio Super Grands 2010
Elias y Ulises Arellano (forma por equipo) Top-Ten tournament 09
2013 NBL IronMan Grand Champion - Trace Megellas
continuous sparring
Trust
Leon Jefferson Vs. Jose Lara - Continuous Sparring - Battle Of The Champions 2009
Leon Jefferson v Ross Levine Heavyweight Grands New England Open 2013
Leon Jefferson vs Greg Betlach at the Compete Nationals 2012
Ross Levine vs Leon Jefferson WAKO Men's Fighting Final at New England Open 2012
Alex Arceo Vs. Leon Jefferson - Point Sparring - Battle Of The Champions 2009
Carlos Estrella - Puntos en el Mexican Challenge
