RIO DE JANEIRO – Neither size nor toughness could save Stephan Bonnar from Anderson Silva.
Silva, who stepped up to light heavyweight to save the injury-rattled UFC 153, brazenly took Bonnar's best shots before launching a knee that crumpled "The American Psycho" in the first round.
The light heavyweight bout served as the main event of Saturday's UFC 153 event at HSBC Arena in Rio de Janeiro. It aired on pay-per-view following prelims on FX and Facebook.
The official time of the stoppage was 4:40 of the first round.
Silva (33-4 MMA, 16-0 UFC) remains unbeaten in the octagon with 16 straight victories, while Bonnar, (14-8 MMA, 8-7 UFC) who sees a three-fight streak snapped, is left to ponder the future of his career.
