This looks like bad news for Philadelphia:

Phillies ace left-hander Cole Hamels will miss his scheduled start Wednesday night because of soreness in his left elbow.

Team physician Dr. Michael Ciccotti said tonight that Hamels began feeling the soreness , which Ciccotti described as a "mild medial elbow strain," several days ago and brought it to the team's attention today. Hamels will undergo an MRI exam Wednesday.

How often do we see a sore elbow turn into something more serious?