The Baltimore Orioles have optioned Cole Irvin to Triple-A Norfolk.

Irvin was one of the Orioles' biggest acquisitions of the offseason. They traded infield prospect Darell Hernaiz to the Oakland Athletics in a one-for-one deal to add Irvin to the starting rotation.

The 29-year-old left-hander has a 10.66 ERA, 13 strikeouts and eight walks over 12 2/3 innings (three starts) this season.