Ahead of his big league debut this afternoon against the Mariners, the Mets promoted Nolan McLean from Triple-A Syracuse. In a corresponding move, Paul Blackburn was designated for assignment. Blackburn will have to pass through waivers to remain in the Mets organization.

There are many reasons as to why the Mets have collapsed, but their starting rotation is undoubtedly the biggest one. The Mets have struggled mightily to get any sort of length out of a starter not named David Peterson, and even Peterson failed to complete four innings his last time out and blew a 6-0 Met lead.