Jessica Simpson was certainly as glamorous as any Dallas Cheerleader Sunday night, with her perfectly coiffed hair and miniature Tony Romo jersey emblazoned with a pink number 9. But she wasn't exactly a good luck charm. Her new boyfriend struggled all game, throwing three interceptions and fumbling the ball twice as his heavily favored Cowboys lost to the Philadelphia Eagles 10-6. At one point, the network even showed a montage of Simpson, 27, spliced with shots of Romo's bad throws. As commentator Joe Buck noted, "It's never easy to play in front of your girlfriend." That seems especially true for Romo. The 27-year-old Pro-Bowler ended the game with a quarterback rating of just 22.2 – that's the worst ever in his entire career. (In comparison, his average rating this year is over 100.) His previous low? Last December, when then-girlfriend Carrie Underwood was in the stands. His latest performance is sure to anger some of the always-outspoken Dallas diehards. In fact, the backlash may have already begun. According to the Dallas Morning News, Romo was heckled outside the arena last night by a female fan who shouted, "Worry about the game, not your girlfriend!"