Fitts, who has been pitching at Triple-A Worcester, will join Boston’s taxi squad on an “if needed” basis, sources said Sunday. The Red Sox are bringing him to the West Coast as insurance because there appears to be a pitcher on the roster who is a candidate to be placed on the injured list. That, however, is a possibility and not a certainty.

After struggling on Friday, Rafael Devers came through in a big way in his second head-to-head against the Red Sox.

The Boston Red Sox just said goodbye to Rafael Devers, but will get reacquainted with their former designated hitter this weekend in San Francisco.