No ultimo sábado, o Ultimate realizou um evento histórico, o dia 19/10/13 sem dúvidas ficará marcado na memória dos fãs das artes marciais mistas. o evento contou com a disputa do cinturão dos pesados, entre o Brasileiro Junior dos Santos e o Americano Cain Velasquez, após uma verdadeira batalha, o americano castigou "Cigano" a luta inteira e saiu com uma vitória por nocaute no quinto round.
O evento contou também com a memorável luta entre os americanos Diego Sanchez e Gilbert Melendez, o chefão Dana White não poupou elogios a apresentação dos dois lutadores dos pesos leves do UFC, mas todo evento tem seus perigos, a integridade física dos atletas tem que ser preservada, e é por isso que após todo evento o UFC divulga a suspensão de cada atleta. confira as suspensões dos atletas do UFC 166:
- Junior dos Santos: Suspended indefinitely pending clearance from an ear, nose and throat doctor
- Shawn Jordan: Suspended indefinitely pending clearance from an ear, nose and throat doctor
- Tim Boetsch: Suspended indefinitely pending clearance from an ophthalmologist
- Cain Velasquez: Suspended until April 18 due to possible broken jaw
- Diego Sanchez: Suspended until Jan. 18 due to cuts
- Darrell Montague: Suspended until Jan. 18 for precautionary reasons
- T.J. Waldburger: Suspended until Jan. 18 for precautionary reasons
- Nate Marquardt: Suspended until Dec. 19 for precautionary reasons
- Andre Fili: Suspended until Dec. 19 due to cuts
- George Sotiropoulos: Suspended until Dec. 4 due to cuts
- Gilbert Melendez: Suspended until Nov. 19 for precautionary reasons
- C.B. Dollaway: Suspended until Nov. 19 due to cuts
- Dustin Pague: Suspended until Nov. 19 for precautionary reasons
- Daniel Cormier: Suspended until Oct. 29 for precautionary reasons
- Roy Nelson: Suspended until Oct. 29 for precautionary reasons
- Jessica Eye: Suspended until Oct. 29 for precautionary reasons
- Sarah Kaufman: Suspended until Oct. 29 for precautionary reasons
- K.J. Noons: Suspended until Oct. 29 for precautionary reasons
- Jeremy Larsen: Suspended until Oct. 29 for precautionary reasons
- Gabriel Gonzaga: Suspended until Oct. 27 for precautionary reasons
- John Dodson: Suspended until Oct. 27 for precautionary reasons
- Hector Lombard: Suspended until Oct. 27 for precautionary reasons
- Adlan Amagov: Suspended until Oct. 27 for precautionary reasons
- Mike Rio: Suspended until Oct. 27 for precautionary reasons
- Tony Ferguson: Suspended until Oct. 27 for precautionary reasons
- Kyoji Horiguchi: Suspended until Oct. 27 for precautionary reasons