He competed in various events at the 2004, 2008, 2012 and 2016 Olympics and won a gold, a silver, and a bronze medal.

[3] He was also successful in the 50 metre rifle prone, winning both the 2002 ISSF World Shooting Championships and the 2004 Summer Olympics in this event.

In Athens, he was very close to winning a historic double, but in the three positions competition, he accidentally cross-fired his last shot and finished eighth.

[4] Emmons's gold medal at the 2004 Summer Olympics in the prone position came while using a borrowed rifle.

"[5] Emmons went on to the 2004 Summer Olympics, and his gold medal in the prone position event, using his former University of Alaska Fairbanks teammate, Amber Darland's .22 rifle.

"[5] At the 2008 Summer Olympics, Emmons won the silver medal in the prone competition.

In his second event, 50 metre rifle three positions, Emmons finished the qualification round in second place, 1 point behind the leader.

[1][12] They met at the 2004 Olympics in Athens when Kateřina came to console Matt after his gold medal blunder.