Starting in the 2016–17 season, Polo joined John Shuster's team as a full-time alternate; the rest of the team included Tyler George, Matt Hamilton, and John Landsteiner. Polo won his sixth US title with Team Shuster at the 2017 United States Men's Championship and then the team finished the 2017 World Championship in fourth place when they lost to Switzerland in the bronze medal match. At the 2017 United States Olympic Curling Trials, Team Shuster beat Heath McCormick's team in a best-of-three final series, setting up Polo's second Olympics appearance. At the 2018 Winter Olympics in PyeongChang, the US team lost four of its first six matches and needed to win all of its three remaining matches to qualify for the playoffs, but all of its remaining opponents (Canada, Switzerland, and Great Britain) were then among the top four teams. Nevertheless, the US team won all three matches to finish the round-robin in third place with a record of 5–4. In the semifinals they defeated Canada's Kevin Koe, a two-time world champion, to reach the gold-medal match versus Niklas Edin's team representing Sweden. The gold-medal game was close through seven ends, with the score tied 5–5, but the United States scored five in the eighth end to set up a 10–7 victory. This was the first Olympic gold medal in curling for the United States.