On June 27, 2017, Toronto FC won their sixth Canadian Championship 3–2 on aggregate over Montreal, earning them a spot in the 2018 CONCACAF Champions League. On September 30, Toronto FC won their first Supporters' Shield with a 4–2 home win over New York Red Bulls to clinch top of the league with the most points that season. By doing so, they also became the first Canadian team to win the Supporters' Shield. On October 22, the final day of the season, they played to a 2–2 away result against Atlanta United FC, where Toronto FC set a new MLS regular season points record with 69, eclipsing the 1998 LA Galaxy by one point. On November 29, 2017, Toronto FC won the Eastern Conference Finals for the second time in a row, with a 1–0 aggregate win over Columbus Crew, also entering the MLS Cup Final for the second time in a row. On December 9, 2017, at home, Toronto FC defeated Seattle 2–0 in the MLS Cup, which was a rematch of the previous year's MLS Cup. Toronto FC became the first MLS team to complete a domestic treble with their win, as well as the first Canadian team to win the MLS Cup.