Fedor was the #1 HW from March 16th 2003 until June 26th 2010.
That is 7 years, 3 months, and 10 days of being the #1 undisputed HW of the world without a loss during that reign.
During Fedor's 7 year reign as the #1 HW he won 20 fights.
Anderson was the #1 MW from October 14th 2006 until July 6th 2013.
That is 6 years, 8 months, and 22 days of being the #1 undisputed MW of the world without a loss during that reign.
During Anderson's 6 year reign as the #1 MW he won 15 fights.
Aldo was the #1 FW from November 18th 2009 until December 12th 2015.
That is 6 years, 0 months, and 24 days of being the #1 undisputed FW of the world without a loss during that reign.
During Aldo's 6 year reign as the #1 FW he won 10 fights.
GSP was the #1 WW from April 19th 2008 until December 13th 2013.
That is 5 years, 7 months, and 24 days of being the #1 undisputed WW of the world without a loss during that reign.
During GSP's 5 year reign as the #1 WW he won 10 fights.
Jones was the #1 LHW from March 19th 2011 until April 28th 2015
That is 4 years, 1 months, and 9 days of being the #1 undisputed LHW of the world before he was stripped of his title.
During Jones' 4 year reign as the #1 LHW he won 9 fights.
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