Andrew McCutchen led off the sixth with a single to left field, chasing Marlins starter Justin Nicolino from the game. David Freese doubled to right field off Urena, who intentionally walked Starling Marte with one out to load the bases.
Francisco Cervelli knocked an infield single off Urena, driving in one run and keeping the bases loaded. Up came Polanco, who worked a 2-1 count then lined a 91-mph changeup 423 feet into the outfield seats with an exit velocity of 110 mph, according to Statcast™.