SAN FRANCISCO —It wasn’t too long ago that manager Bob Melvin, having been swept by the Padres at home in mid-August, mentioned the idea of giving his regulars some days off and getting looks at younger players. With the Giants in the midst of a six-game winning streak , those plans are likely on hold.

On Sept. 1, the Giants’ brass will have to decide which two players they select from Triple-A Sacramento to join the big-league roster as rosters expand from 26 to 28. With San Francisco still mathematically alive, president of baseball operations Buster Posey and company may find themselves leaning towards players more equipped to win now.

Here’s a look at the most compelling candidates to be called up when the rosters expand:

(All stats are entering Friday)

The Giants have had plen

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