Zavala (oblique) has gone 1-for-5 with an RBI in two games since being reinstated from Triple-A Worcester's 7-day injured list Tuesday.
Zavala missed just over a month of action due to a left oblique strain, but he rejoined Worcester after finishing up a rehab assignment in the rookie-level Florida Complex League. Now that he's returned to health, he'll serve as organizational depth at catcher for the Red Sox.