Johan Santana may make the decision whether to shut him down real easy.

Before last night's game, the Mets had decided the two-time Cy Young winner was going to stay in the rotation and make his scheduled start on Thursday against the Rockies. After the 3-1 loss to the Rockies, however, manager Terry Collins said Santana's status is now in question because he will have an MRI exam on his back today.

Santana had already been dealing with lower back pain, but he had declared it as nothing more than minor after his bullpen session yesterday, noting it would not prevent him from pitching.