List of MLS club post-season droughts

Columns: Club | Last domestic cup won | Subsequent final losses | Length of drought
Vancouver Whitecaps FC | 2015 Canadian Championship | 2016 , 2018 | 4 seasons | FC Dallas | 2016 U.S. Open Cup | 3 seasons | Minnesota United FC | never ( club entered MLS in 2017 ) | 2019 | 3 seasons | Los Angeles FC | never ( club entered MLS in 2018 ) | 2 seasons | Sporting Kansas City | 2017 U.S. Open Cup | 2 seasons | FC Cincinnati | never ( club entered MLS in 2019 ) | 1 season

Example questions:
When did the Major League Soccer club with an ownership group led by Carl H. Lindner III last win the domestic cup ? | When did the Major League Soccer team based in Harrison , New Jersey last win the domestic cup ? | Who did Los Angeles Galaxy beat to win their last domestic cup in Major League Soccer ? | Which team won the 104th edition of the oldest ongoing competition in American Major League Soccer soccer ? | What is the length of the drought for the Major League Soccer team currently led by interim head coach Freddy Juarez ?

Answers:
2019 | 1996 | FC Dallas | Sporting Kansas City | 15 seasons