Brian Sweeney refers to multiple notable individuals, but the most prominent are:
- Brian David Sweeney (1963–2001) : He was a former pilot and instructor for the United States Navy and later worked for a defense contractor. On September 11, 2001, he was a passenger on United Airlines Flight 175, which was hijacked and crashed into the South Tower of the World Trade Center. Before the crash, he made a poignant phone call to his wife, Julie Sweeney Roth, expressing his love and calm acceptance of the situation. His final voicemail has become a powerful symbol of the lives lost on 9/11 and is preserved by the 9/11 Memorial & Museum. He was married to Julie, a teacher, and they lived on Cape Cod
- Brian Edward Sweeney (born 1974) : An American former professional baseball pitcher who played in Major League Baseball (MLB) for the Seattle Mariners and San Diego Padres, and in Japan's Nippon Professional Baseball (NPB) for the Hokkaido Nippon-Ham Fighters. After his playing career, he became a pitching coach, currently serving as the pitching coach for the Kansas City Royals. He also coached for the Cleveland Guardians and has been involved in coaching Team Italy in the World Baseball Classic
- Brian E. Sweeney (1971–2001) : A New York City firefighter who served from 1995 until his death on September 11, 2001. He was recognized for his hard work and enthusiasm and served in multiple firehouses in New York City, including Engine 263 in Queens and Ladder 8 in Manhattan
Each Brian Sweeney has a distinct legacy in different fields—aviation and 9/11 history, professional baseball, and firefighting, respectively. The most widely recognized in public memory is Brian David Sweeney, the 9/11 victim known for his final message to his wife
