Prompt
Create a realistic portrait image of Roger Staubach, a renowned American football player, in his Dallas Cowboys uniform, specifically wearing jersey number 12, with a football in hand, standing in front of a subtle background that hints at his achievements, such as a faint image of the Super Bowl trophy or the Cowboys' stadium. Capture his determined and charismatic personality, known as "Captain America" or "Captain Comeback," with a strong and confident pose. Incorporate a classic, nostalgic feel to the image, reminiscent of the 1970s, to reflect his playing career and iconic status in American football.