Barnett got a takedown to full mount within 10 seconds of the opening bell, and it looked like the bout wouldn't even see 30 seconds. Though "Mondragon" made it back to his feet, Barnett finished another takedown, again straight into full mount, and exploited the Belem native's nascent ground skills by posturing up and pounding away.
Dos Santos turned away from Barnett, who hammered right hands into the Brazilian's earhole. After a salvo of clean rights, referee "Big" John McCarthy stopped in to halt the bout at 2:35 of the first frame. Dos Santos complained to McCarthy that the bout was stopped too early. As Dos Santos reached his feet in protest, the hulking Brazilian was rubber-legged, zig-zagging across the cage.
"The referee stopped the bout; that's the only reason I quit," said Barnett after the bout. "If he thought it was going to get any better for him, he's wrong."
The loss was Dos Santos' third in his last four, with that quartet of bouts all coming in the last five months.