Ahead of this Sunday’s trip to LA Galaxy for the first leg of the Western Conference semifinal (ESPN, 3:00 p.m. MT), here are 10 things that you may, or may not, have known.

1. The last time that Colorado Rapids were involved in the MLS postseason was October 30, 2013. They lost the play-in game at Seattle Sounders FC 2-0. Marc Burch played the second half for the Sounders, as replacement for the injured DeAndre Yedlin. The only survivor from the Rapids’ 18 that day is Dillon Serna, who was an unused substitute.

2. Colorado's previous experience of a Conference semifinal came at Sporting Kansas City on November 2, 2011 when they lost 2-0 at LIVESTRONG Sporting Park to go out 4-0 on aggregate.

3. This is the first time that the Colorado Rapids have appeared in the Western Conference semifinals since 2006. Their most recent semifinal appearances (2010 and 2011) were both in the Eastern Conference portion of the playoffs.

4. The last time that the Rapids won a playoff game was on October 27, 2011 when they defeated Columbus Crew 1-0 in the wild card play-in match. Omar Cummings netted the game’s only goal. LA Galaxy defender Robbie Rogers played for Columbus.

5. Recent regular season form against the Galaxy has been solid, with two ties in Carson and a last-gasp, glorious win at Dick’s Sporting Goods Park in the 2016 home opener.

6. Playoff numbers against LA are, er, disappointing at best. The Rapids stand 1-6-0 in postseason matchups against the Galaxy, with just one goal scored and 14 conceded.

7. The only Colorado Rapids player to score against the Galaxy in the playoffs is former Haiti international Jean Philippe Peguero. He netted in the home leg of the quarterfinals on October 22, 2004 in a 1-0 win.

8. The Rapids first met LA Galaxy in the postseason on October 17, 1999 at the Rose Bowl in Pasadena. Goals from Ezra Hendrickson, Greg Vanney and Cobi Jones gave the Galaxy a comfortable 3-0 lead from the first leg.

9. The last meeting with the Galaxy in the playoffs came on November 5, 2005. Two goals from Landon Donovan sealed victory for the Galaxy in the one-off Western Conference Championship game at INVESCO Field at Mile High. The Galaxy went on to lift their second MLS Cup with a 1-0 win over New England Revolution.

10. Head Coach, Pablo Mastroeni, holds the Colorado Rapids record for most appearances in playoff games, with 19.

The second leg of the Western Conference semifinal is at Dick's Sporting Goods Park on Sunday, November 6 (kickoff time to be confirmed). Click HERE for tickets.