It was the first year under the league's revised single-elimination play-off format, which resulted in an uptick in attendances and viewership, reports, www.sportspromedia.com/.
Even before Sunday's final, which saw 69,274 supporters turn out at CenturyLink Field, the second-highest in MLS Cup history, the play-offs had achieved a record high average attendance of 31,100 per game.
TV ratings were also up across all MLS broadcast networks, with the Eastern Conference semi-final between local rivals Los Angeles Football Club and the Los Angeles Galaxy the league's most viewed play-off game ever on US sports broadcaster ESPN.
Overall, the play-offs delivered a 66 per cent increase in viewership for ESPN over the regular season, which saw an average audience of 246,000 viewers tune in across the broadcaster's 31-game schedule.
In addition, MLS said the 2019 play-offs achieved the highest digital engagement in post-season history. Engagement with the MLS website was up 47 per cent on last year, while the league's official app enjoyed a 30 per cent boost over 2018. Twitter video views also increased 86 per cent and minutes watched were up 113 per cent.