Anderson is expected to be called up from Triple-A Worcester on Friday, Ari Alexander of 7 News Boston reports.
Anderson will join the major-league roster for the second time this season, having produced a 3.38 ERA and 1.25 WHIP with six strikeouts over eight innings in three appearances with Boston earlier this season. The right-hander pitched multiple innings in all three of his previous outings with the Red Sox, reaching 52 pitches in his longest appearance April 14 versus the Twins.