The Mets starting rotation, and potentially the season, is in a state of flux/emergency, after Jon Niese hurt his right hamstring and had to leave the game yesterday. It is the same hamstring/spot where he had the surgery last year. He is in New York undergoing tests (MRI) and getting evaluated today to see if it the repair failed or if it was scar tissue that broke up and caused the pain. If it's only scar tissue, this is a non-issue and he may not even miss a start. If the repair failed, he may be done for the year; there is very little research data with a proximal hamstring repair on pitchers, and I doubt there is any data of the success rate if the surgery needs to be revised.
With Perez moving to the bullpen (and refusing to go to the minors), Maine with a terrible start on Saturday and now this, the Mets are in dire need of some good news/good starting pitchers.