SEATTLE—They’re at it again. Toronto FC and the Seattle Sounders will go head-to-head in the MLS Cup final for the third time in four years on Sunday at CenturyLink Field (TSN, 3 p.m.). They split the first two. Expect a cagey chess match with the margin for error perhaps even slimmer than in your average final. Here’s a look at three things each team must do to hoist the championship trophy.
Toronto FC
Weather the storm
There will be 66,000-odd fans on hand in Seattle, almost all of them roaring for the home team from the first whistle.