Could Felix's elbow wipe out record deal?

The big news late last week was that the Seattle Mariners had agreed to to a massive contract extension with ace Felix Hernandez that would keep him in Seattle through the 2019 season and pay the right-hander $175 million in total. The deal, of course, was contingent upon everything checking out okay with regards to Hernandez's health, which is often a formality. In this case, though, the status of Hernandez's elbow appears to be anything but.