Yahoo Sports reports: Athletics manager Mark Kotsay is looking at his options for his rotation after Luis Severino was sidelined by a strained right shoulder. The A's brought up right-handers Kade Morris and Mason Barnett from Triple-A Las Vegas before Tuesday's game at the Chicago Cubs. Right-hander Michael Kelly and left-hander Jacob Lopez were sent down, and right-hander Brooks Kriske was transferred to the 60-day injured list.