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Fitts (pectoral) has been throwing up-and-down bullpen sessions and is expected to be cleared to face hitter soon, MLB.com reports.

Fitts is a month removed from landing on the 15-day injured list with a right pectoral strain and has progressed well lately. The right-hander will require a rehab assignment before being activated and might be optioned to Triple-A Worcester rather than rejoining the Red Sox.

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