Mursak, a Red Wings draft pick who played for the team for parts of three seasons, scored the game-tying goal late in the third and then netted the game-winner in overtime to lift Slovenia to a surprising 3-2 win over the US on Wednesday morning.
Goals from Jan Urbas and Mursak in the third period sent the tie into overtime. He scored one goal in 19 games. O'Neill got his second point of the day with an assist on Greenway's even-strength tally, but that was the last time the United States would get on the scoreboard.
In the five-minute, 3-on-3 overtime, Team USA put up no shots on goal before Mursak again tallied the game victor just 38 seconds into the frame for the 3-2 victory.
Tony Granato, a former assistant coach of the Red Wings, who is how head coach at Wisconsin, and Chris Chelios, who is now an assistant coach in Detroit, are two of the United States coaches.
The United States had a 2-0 lead entering the third period thanks to goals by Brian O'Neill and Jordan Greenway.
The Olympic hockey tournament is being played without NHL players for the first time since the Lillehammer Games in 1994 after the league and International Olympic Committee failed to agree on players' travel and insurance costs.
The Boston University standout, who's the first African American player to represent the U.S.in men's ice hockey at the Olympics, found a loose puck amid a scrum in front of Slovenian netminder Gasper Kroselj and tapped it home to make it 2-0.
Along came Slovenia's Jan Mursak. Blaz Gregorc cut the lead in half on a shot from the point through a pile-up of bodies in front of the net.
In the 3-on-3 overtime, Mursak got free on the doorstep and scored high over American goalie Ryan Zapolski less than a minute into the extra frame. He was on the ice for Slovenia's first goal, but not the final two. Team Canada has taken the last four Olympic gold medals, with the USA winning the 1998 Games.
Returning to the lineup later in the season, he had trouble finding any playing time, the Red Wings put him on waivers and Mursak signed with Amur Khabarovsk of the KHL. "Its great, but we need to start looking forward to our next game vs. Slovakia".