NEW YORK (CBSNewYork) — The Mets have been very active ahead of the July 31 non-waiver trade deadline.

Last Friday, New York acquired veteran infielders Juan Uribe and Kelly Johnson from the Braves. On Monday, the club traded for shutdown reliever Tyler Clippard.

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Next on the checklist? Another bat.

According to CBSSports.com/WFAN baseball insider Jon Heyman, general manager Sandy Alderson is interested in trading for Brewers outfielder Gerardo Parra.

Heyman reports that the Angels, Orioles and a “mystery team” are also in the mix for the left-handed hitter.

Parra, who will be a free agent after the season, is a versatile outfielder. He’s played 30 games in center field, 45 games in left field and 15 games in right field this season.

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More importantly to the Mets, he’s a dangerous hitter. The 28-year-old is having a career year, batting .318 with nine home runs, 23 doubles and 31 RBIs.

If the Mets acquire Parra, Alderson might consider sending down top prospect Michael Conforto, who is 4-for-9 through three big league games.

Heading into Tuesday night’s series opener against the Padres at Citi Field, the Mets are two games behind the first-place Nationals in the National League East.

They’re four games behind the Giants for the second NL wild-card berth, with the Cubs standing between them and San Francisco.

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The Mets will host the Nats in Queens this weekend.