UFC 137 recorded a live gate of $3,900,650 at the Mandalay Bay Events Center in Las Vegas, Nevada, on Oct. 29, 2011, according to official figures from the Nevada State Athletic Commission released earlier today.
The final attendance of 10,313 was a result of 8,179 tickets sold and 2,134 complimentary tickets while 409 tickets remained unsold.
In addition, the "Sin City" hotel also raked in $26,150 for the 523 patrons willing to pay for the closed-circuit viewing party, leaving 2,081 seats empty and 200 moochers there for free.
But that's not all.
But don't take my word for it.
Complete UFC 137: "Penn vs. Diaz" results, commentary and updates are all right here.