What happened: Melendez joined New York in February after playing for the Kansas City Royals. His last major-league appearance came against the Chicago Cubs in June.
Why it matters: The roster opening gives New York flexibility ahead of Monday's trade deadline. The Miami Marlins lead the series 2-1.
By the numbers: Sunday's game is in progress at 0-0.
What to watch: Melendez will pass through waivers and could return to the Mets' minor-league system if he clears.