Though the Giants have cautioned that they won’t spend wildly in MLB free agency, president of baseball operations Buster Posey could take a big swing in the trade market.

The Giants are one of five teams currently "in on" trading for Brewers right-handed pitcher Freddy Peralta , The Athletic’s Ken Rosenthal and Will Sammon reported Wednesday , citing people familiar with Milwaukee's discussions. The addition instantly would upgrade San Francisco’s starting rotation.

Rosenthal and Sammon listed the Baltimore Orioles, Boston Red Sox, New York Yankees and Houston Astros as other teams currently pursuing Peralta, while the New York Mets “are also believed to be interested.”

The 29-year-old Peralta is coming off his best MLB season. He posted a 17-6 record with a 2.70 earned run aver

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