In a rehab start at Double-A Akron on Friday, Westbrook allowed three hits in six scoreless innings, a sign that he's ready to return to the Indians' rotation. He should be headed back to the Majors in the next few days.
Westbrook had been on the 15-day DL since April 20, the day he strained his left intercostal muscle.
"We've got to get Jake back on the roster," manager Eric Wedge said earlier in the day. "We'll see him next week."
Before going on the DL, the 30-year-old Westbrook was 1-2 with a 2.73 ERA.
Justice B. Hill is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.