There have been five meetings between Major League Soccer’s fiercest rivals this season, and from the four that have mattered, the Portland Timbers have been able to walk away happy with their underlying performances. That doesn’t mean Seattle Sounders FC has always ended up behind on the scoreboard, but going into the teams’ sixth meeting with the second leg of the Audi 2018 MLS Cup Playoffs Western Conference Semifinals on Thursday (7:30pm PT, FS1 | Match presented by Carl's Jr.), Brian Schmetzer’s Seattle team is still in search of a trick to pull off ahead of another meeting between the Cascadia counterparts.