PHOENIX, AZ — After an tough loss to the Giants earlier in the week, the Diamondbacks entered their weekend series against the Phillies with heightened urgency and very little margin for error. The Diamondbacks’ postseason hopes hung by a thread, and the three-game series at Chase Field provided both reminders of the team’s shortcomings and flashes of why it could still be dangerous if it sneaks into October.

Friday’s opener began with promise. A big, energetic crowd saw the Diamondbacks jump out to a two-run lead in the first inning, giving Ryne Nelson some cushion. Ketel Marte set the tone with an early home run, and manager Torey Lovullo was pleased with the fast start.

“Ketel [Marte] gets off a good swing and hits a home run. Follow that up with another run and some good approaches [

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