PITTSBURGH — Now is the time, Dodgers manager Dave Roberts believes, for his team’s intensity to rise.

And if the external pressures of a tight National League West race, postseason seeding implications and a looming World Series defense in October don’t do it, then maybe, he hopes, increased internal battles for playing time will.

For a while on Tuesday night, in a series opener against the perpetually rebuilding Pittsburgh Pirates, the Dodgers showed fight. Clayton Kershaw gave up four runs in an ugly first inning, but the lineup clawed its way back to even the score — thanks, in part, to a 120-mph rocket of a home run from Shohei Ohtani in the third, his 46th of the season and 100th as a Dodger and a tying solo blast from Andy Pages in the fourth.

Kershaw, meanwhile, settled down

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