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 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.