In Week 3 of the 1999 season, in a game played at Sun Devil Stadium and nationally televised on Monday Night Football, Williams delivered the hit which ultimately ended Hall of Fame San Francisco 49ers' quarterback Steve Young's career. Williams came in on a cornerback blitz from Young's blindside and scored a vicious helmet-to-helmet hit on Young. Running back Lawrence Phillips was supposed to block Williams, but missed. This left Young unconscious on the field for several minutes. Young suffered a severe concussion that effectively ended his career; he didn't play again for the rest of the season, after which the 49ers all but forced him to retire.