Boston Red Sox manager John Farrell says he has a "very treatable" form of cancer.
Farrell said Friday that he would take a medical leave to deal with lymphoma.
The 53-year-old Farrell says bench coach Torey Lovullo will run the team in his absence.
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The Red Sox are in last place in the AL East with a 50-64 record.
Farrell guided Boston to the World Series championship in his first season in 2013.