Anthony hasn't appeared in a game for Double-A Portland since May 25 due to ribcage irritation, Chris Hatfield of SoxProspects.com reports.
Though Anthony hasn't played in more than a week, Portland hasn't placed him on its 7-day injured list. The Red Sox organization reportedly views Anthony's injury as a day-to-day concern, so the outfield prospect could return to Portland's lineup at some point during the upcoming week. The 20-year-old is slashing .243/.365/.392 with three home runs and five stolen bases over 178 plate appearances at the Double-A level this season.