Ann-Marie Pfiffner competed in small-bore rifle shooting at the 1992 Barcelona Olympics. She attended West Virginia University, leading them to four consecutive NCAA rifle titles, and winning the air rifle title in both 1991 and 1992. She was voted the most valuable shooter in 1992 and received the Fred Schaus Captain’s Award. Pfiffner won a bronze medal in air rifle at the 1995 Pan American Games. Her other medals include a silver in air rifle at the 1991 US Olympic Festival, a bronze in air rifle at the 1991 World Cup USA, and a bronze in small-bore rifle at the 1992 World Cup USA.