Farrell says the injury is more than a day to day condition. He didn't speculate on when Ellsbury could play again.
Farrell said Ellsbury was going to get a second opinion from a foot specialist in Colorado.
Ellsbury tops the majors with 52 stolen bases. The leadoff man is hitting .299 and has scored a team-high 89 runs.
The AL East leaders recalled Jackie Bradley Jr. from Triple-A Pawtucket. He was in the starting lineup Saturday against New York.
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