LAS VEGAS – Lucas Rocha had to battle some early adversity before finishing Davi Bittencourt at Dana White’s Contender Series 66. Rocha (17-1) came from behind to score a highlight reel knockout of Bittencourt (14-4) in their bantamweight bout Tuesday to earn a UFC contract. Before landing the brutal knee knockout, Rocha had his back taken in Round 1 and was battling to fend off Bittencourt’s rear-naked choke attempts.