Gittens will start at first base and bat fifth Sunday against the Red Sox.
While all of Luke Voit (knee), Gio Urshela (COVID-19) and Miguel Andujar (wrist) are on the shelf, Gittens should be in store for a full run of playing time at first base. He'll stick in the lineup for the third straight game after going 1-for-4 with a pair of walks between the first two contests of the series.