Matt Cain was placed on the disabled list with right elbow nerve irritation Friday, clearing the way for rookie Chris Heston to start Sunday against the Cardinals.
“I felt it in my last start, and it kind of lingered the next day,” said Cain, who had an MRI, which showed the irritation, and cortisone shot. “The MRI looks good, nothing out of the ordinary. We just want to calm it down and let me throw with my natural motion.”
Cain said he also felt the irritation sensation during his rehab assignment but didn’t consider it major.