Liberatore exited Thursday's start in the second game of a doubleheader against the Royals due to fatigue, Jim Hayes reports.
Liberatore labored through four innings, allowing six earned runs on eight hits and a walk. His velocity was also down to 89.8 mph in his final at-bat, so fatigue is seemingly the best news possible. It's unclear if Liberatore will require further testing or whether he will make his next turn through the rotation.