What happened: The Mets and Phillies open tonight at 6:10 p.m. ET, an hour earlier than originally scheduled, with the game airing exclusively on ESPN and the ESPN App. The change follows a Code Red air quality alert in the Philadelphia area.

Why it matters: MLB said it will continue monitoring air quality conditions through the game. The series arrives as the Phillies open the second half hosting the Mets with the trade deadline looming.

What to watch: MLB's continued air quality monitoring could affect the game's progress as it unfolds tonight.