Kansas, Real Salt Lake advance
Defending MLS Cup champions
The 4-0 aggregate victory sets up an Eastern Conference final against either Houston Dynamo or Philadelphia Union for Peter Vermes' team.
Real Salt Lake preserved their first-leg advantage to move into the Western Conference final at the expense of the Seattle Sounders.
However, Osvaldo Alonso's 56th minute penalty and substitute Lamar Neagle's goal five minutes later made for a nervous half an hour before Salt Lake progressed 3-2 on aggregate, setting up a final against either Los Angeles Galaxy or New York Red Bulls.