Ruf is not in the lineup for Tuesday's game against the Padres due to left shoulder soreness, Jim Salisbury of CSNPhilly.com reports.
Ruf apparently jammed his left shoulder in Monday's game and will get it examined. Manager Pete Mackanin says he is hopeful that Ruf will still be available to pinch hit, but the 29-year-old should be considered day-to-day until more information is released regarding the injury.