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.

The Boston Red Sox need to acquire starting pitching by the July 31 trade deadline, but the Chris Paddack deal shows it won't be easy for them.