J.P. Losman said Tuesday night he has signed with the Las Vegas entry of the start-up United Football League, where he will be coached by former Giants boss Jim Fassel. He immediately becomes the league's marquee player, a former first round pick who was Buffalo's starting quarterback 33 times over the past four seasons. An unrestricted free agent, Losman had discussions with Denver and Carolina this past offseason, but the Broncos signed Chris Simms instead, while the Panthers decided to stand pat, according to an ESPN report.