The bullpen is priority No. 1 for the Mets, who have lost five arms, four relievers, to season-ending surgery. This leaves them with an opening or two in middle relief.

As the MLB trade deadline looms, the New York Mets and Philadelphia Phillies are reportedly preparing aggressive moves to bolster their rosters, signaling a potential high-stakes battle for postseason positioning.

Here's what you need to know about the trade deadline, including the top players on the trade block and what moves the Yankees and Mets have made so far. In years prior, it used to be set in stone on July 31 at 4 p.m. ET. According to MLB.com, the commissioner's office can set the deadline from a date range of July 28 and Aug. 3.