UFC 140 will be held on December 10 Canada Centre in Toronto.
Bocek, who struggles in his homeland, comes from a loss to Ben Henderson at UFC 129 in April. But before that he had been in a sequence of four wins in five fights. The Canadian customer is important for fighters like Henderson, Jim Miller, Mac Danzig and defending champion Frankie Edgar.
Lentz, meanwhile, increasingly want to extend their current winning streak, he is unbeaten in 15 fights. His last loss was to Mark Moreno in March 2007. Since his last fight was a no contest against Charles Oliveira at UFC on Versus 4.
The UFC 140 card is now as follows:
Frank Mir vs. Antonio Rodrigo Nogueira
Antonio Rogerio Nogueira vs. Tito Ortiz
Vs. Brian Ebersole. Rory MacDonald
Vs. Mark Bocek. Nik Lentz
Rich vs. Attonito. Claude Patrick
Vs. Dennis Hallman. John Makdessi
Vs. John Cholish. Mitch Clarke