The Cubs' runs came from Javier Baez's pair of homers and Willson Contreras' monster solo shot, measured by Statcast™ as the longest postseason homer since 2015 at 491 feet.
The Dodgers got their runs through homers from Cody Bellinger and Justin Turner, who further burnished an incredible postseason resume. Turner is now hitting .378/.495/.659 in his 25 career playoff games and holds the career highest on-base percentage in MLB postseason history (min. 100 plate appearances), just above Lou Gehrig (.483) and Babe Ruth (.470).
It's surprising to see these two teams make history that requires a frequent lack of baserunners, as the two teams ranked in the NL's top three in on-base percentage during the regular season. The Cubs and the Rockies were tied for the top mark at .338, while the Dodgers ranked third at .334.
The only other postseason game to see as many as three runs scored only via solo shot was Game 1 of 1983 World Series, per Elias. In that game, the Phillies topped the Orioles 2-1, with solo blasts from Garry Maddox and Joe Morgan beating Jim Dwyer's lone homer.