Mavs First NBA Season On this day, in 1980 the Dallas Mavericks opened their first NBA season with a 103-92 victory at home against in state rivals the San Antonio Spurs. October 11, 1980 Sport: Basketball Trivia What Are the Five Events That Make Up the Modern Olympic Pentathon? Which Nations Won the Gold, Silver and Bronze Medals the Last Time Baseball Was an Olympic Sport? sports in this article Basketball tags in this article Fan On This Day SportsEngine