Twins' Logan Darnell: On Triple-A DL with sore shoulder

Darnell has been placed on the 7-day DL at Triple-A Rochester with a sore left shoulder, the St. Paul Pioneer Press reports.

Darnell auditioned as a lefty reliever in spring training, but has been a starter at Triple-A. He's having a decent season with a 3.53 ERA, but his meager 4.4 K/9 reflects limited upside.