After losing star slugger Aaron Judge to the injured list with a flexor strain in his elbow, the New York Yankees are facing a tough decision on whether to buy or sell at Thursday's trade deadline.

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.

In his third MLB start, Yankees' right-hander Cam Schlittler lasted 4.1 innings, yielding three runs on seven hits and four walks, with five strikeouts, in a 4-2 loss to Tampa Bay.