Per MetsBlog.com, Philip Humber was pulled from his scheduled start for Triple-A New Orleans. Humber has missed a couple of starts in a row, so it might be nothing. Or, it might be something. Or, it might be both nothing and something simultaneously. We'll see.
UPDATE [2:43pm]: Jon Heyman of SI.com indicates that the Mets offered Humber to the Nationals for Chad Cordero.