Mark McGwire Signs with the St. Louis Cardinals On this day, in 1997 Mark McGwire was traded by the Oakland Athletics to the St. Louis Cardinals in 1996. The next season he agreed to an average of $9.5 million a year on a three-year, $28.5 million contract with the Cards. September 16, 1997 Sport: Baseball 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 Baseball tags in this article Fan On This Day SportsEngine