49ers wide receiver and kick returner Kyle Williams received death threats on social media outlets following Sunday's NFC Championship Game. Williams, a second-year player out of Arizona State, not only had a fumble in overtime that led to New York's game-winning field goal, but early in the fourth quarter a rolling punt glanced off his knee. The Giants recovered at the San Francisco 29-yard line and scored a go-ahead touchdown less than three minutes later. His father, White Sox general manager Kenny Williams, questioned the "culture of sports" after the threats. "I'm used to the years of criticism and threats on my life from time to time, but I have to hear about threats on your son's life while you're watching TV and it certainly makes you question our culture of sports as it stands," Kenny Williams said. Williams broached the subject of the death threats on his own after he was asked if Sunday was the toughest day he had ever experienced in sports. He said it was by a long shot. "I told his mother on the way out exactly what was coming," Kenny Williams said about the threats. "That's the nature of the beast."