Erik Silva ’s attempt to redeem himself after a failed promotional debut quickly turned into a nightmare during the UFC Fight Night 237 card opener Saturday in Mexico City. The bout only lasted 44 seconds as Silva (9-3 MMA, 0-2 UFC) suffered an apparent left leg injury as he stepped backward during his featherweight prelim against Muhammad Naimov (11-2 MMA, 3-0 UFC). A replay appeared to show an abnormal shift in the knee area. Silva clinched Naimov initially, but eventually fell to the canvas and covered up as Naimov threw a couple punches