He earlier said he would retire rather than fight in the lower division.
He fought in the top division for 77 consecutive tournaments and was one of the first wrestlers to win over 500 bouts there.
He fought in the top division for a total of 42 tournaments, making his final appearance in May 1996.
During his successful boxing career he fought in the Light Heavyweight division.
He fought in the top division for a total of seven tournaments.
Many cruiserweight champions and contenders may eventually fight in the heavyweight division.
Troy is fighting in the super middleweight division at 165 pounds.
He later went down in weight, to fight in the then newly created division of the Cruiserweights.
The former world champion fought in the light welterweight division for the first time in almost seven years.
He usually fought in the supermiddleweight division, which has a weight limit of 168 pounds.