UFC 166 by the numbers

UFC heavyweight champion Cain Velasquez will face No. 1 contender Junior dos Santos on Saturday for the third time in the past two years. The fighters have split the first two matchups.

In the co-main event, third-ranked Daniel Cormier fights at heavyweight for possibly the final time when he takes on Roy Nelson.

Here are the numbers you need to know for the fights:

8: Velasquez has eight UFC victories by KO/TKO, most by any heavyweight in company history. The 8 KO/TKO wins are tied for fifth all-time. Tied for second on the heavyweight list is dos Santos with seven.

57: Velasquez lands 57 percent of his significant strikes, seventh highest all-time and tops among active heavyweights. In his victory over dos Santos, Velasquez landed 50 percent of his significant strikes (111 of 224). “Cigano” landed 49 percent of his significant strikes.

11: In their last fight, Velasquez secured 11 takedowns on dos Santos, a career high for the former All-American from Arizona State. Before that fight, opponents had taken down dos Santos twice in 17 attempts (88 percent defense). Velasquez lands an average of 6.5 takedowns per 15 minutes.

5: Both fighters land over 5 significant strikes per minute in UFC fights. Velasquez is first with 6.50 significant strikes per minute while dos Santos is 7th at 5.46 significant strikes per minute. They are 1st and 3rd respectively in the UFC heavyweight division all-time (Stipe Miocic 5.48).

3: There have been three title fights in UFC history to take place in Houston. Champions Frankie Edgar and Jose Aldo retained their titles at UFC 136. The biggest upset in UFC history also occurred in Houston as Matt Serra defeated Georges St-Pierre for the welterweight title at UFC 69.

4: Of the 15 men who have held a version of the UFC heavyweight title, four have defended the title two consecutive times. Randy Couture defeated Pedro Rizzo twice in 2001. Andrei Arlovski defended an interim title against Justin Eilers and then the undisputed title against Paul Buentello in 2005. Tim Sylvia defeated Arlovski for the title, and then defended against him and Jeff Monson in 2006. Brock Lesnar defended his undisputed title against interim champions Frank Mir in 2009 and Shane Carwin in 2010.

10: Velasquez vs. dos Santos III will be the 10th trilogy in UFC history. Of the previous 9 to be completed, only one has taken place within the UFC heavyweight division (Sylvia vs Arlovski). As Velasquez did against dos Santos, Sylvia lost the first fight and his interim title at UFC 51, but then won it back at UFC 59 in the second matchup. In the final installment less than three months later, Sylvia was victorious again at UFC 61.

26: Cormier has landed an average of 26 more significant strikes in each of his nine UFC/Strikeforce fights over his career. In his last fight, he outlanded Frank Mir 59-24 en route to a unanimous decision victory. Cormier has never been outstruck in any of those nine fights. Nelson was outstruck in his last fight by Stipe Miocic 106-23.

4: Knockout of the Night awards for Nelson, tied for second most all-time and 1st among heavyweights. All four of those victories were in the first round as well as nine of his 12 career KO/TKO wins. Cormier has five victories by KO/TKO, three of which occurred in the first round.