Smyly (elbow) was placed on the 10-day DL on Friday, Ryan Divish of the Seattle Times reports.
After being scratched from his scheduled start Friday, Smyly was examined and diagnosed with a left elbow strain. He is expected to miss six-to-eight weeks. Ariel Miranda will get the first crack at replacing Smyly in the rotation, with his first start coming April 6 at Houston.