2. The pressure of being a big team
Being out of the playoff positions at this point in the season is worrying for any team, but it is evident that the nervousness and pressure increase when you are the team with the most titles in MLS history...
St. Louis City SC is a young team, literally newborn. Nerves can play tricks on them, just like they can on the LA Galaxy, but for completely different reasons. In the first half of the game you could see that version of the team, with very questionable decision making, which ended up costing them dearly.
The LA Galaxy must correct these errors to play at the highest level for the entire 90 minutes.