It's Monday, MLS action is back, and it's time for ESPN's Power Rankings.

Which team looks the strongest? Which one is in for a long year? Our writers studied the action from across Matchday 6 to come up with this week's order. Let's dive in.

1. LAFC

Previous ranking: 2

Son Heung-Min notched four first-half assists (almost matching Lionel Messi's assists-in-one-half record) in a 6-0 win against Orlando. Three of those were to Denis Bouanga, who clocked his fifth MLS hat trick in a dominant win for the only team yet to concede a goal this season.

2. Nashville SC

Previous ranking: 1

Nashville proved mortal in a windy Chicago after losing 1-0 to the Fire. After conceding in the first minute, it couldn't break through a Chicago defense buoyed by four saves from Chris Brady. Nashville has a few days to recover before Tuesday's Concacaf Champions Cup quarterfinal against Club América.

3. Vancouver Whitecaps

Previous ranking: 3

Vancouver took an early lead against Portland, then conceded twice and trailed until the 91st minute. But winning teams find a way; Thomas Müller converted a late penalty minutes before Sebastian Berhalter helped set up his own 95th-minute match winner to steal a 3-2 victory at home. After losing to San Jose...