Myers, who is currently on the 60-day disabled list, felt discomfort once again in his throwing elbow while warming up prior to a Minor League rehab assignment on Monday night. Francona said that Myers was then scratched from the planned two-inning outing, and will not pick up a baseball for at least the next three to five days.
Myers underwent an MRI exam, but the results came back clean.
Francona said the pitcher will be re-evaluated once the Indians return to Cleveland.
"The scan came back good, which is good. It's just now we've got to figure out the plan," Francona said. "It kind of is what it is. He's got a lot of wear and tear. When we get back home, we'll sit and talk to him and kind of see how he wants to progress with it."
Myers, 32, signed a one-year contract worth $7 million to be Cleveland's No. 3 starter this season, but landed on the disabled list with the right elbow injury after going 0-3 with an 8.02 ERA in four appearances. It was recently determined that he would transition to a relief role rather than trying to return as a starter.
"He wants desperately to help us out," Francona said. "I think we all thought starting was out of the question, so we'd go the bullpen route. I think a lot of it will be determined on how he feels next time he picks up a ball."
Jordan Bastian is a reporter for MLB.com. Read his blog, Major League Bastian, and follow him on Twitter @MLBastian. This story was not subject to the approval of Major League Baseball or its clubs.