Dirks will report to minor league spring training to continue rehabbing his back, Brendan Kennedy of the Toronto Star reports.The 29-year-old underwent surgery in March to correct a lingering back issue, and was shut down from his rehab assignment in August due to a hamstring concern. It sounds like Dirks is still working himself back to full strength, and it's uncertain when he may be cleared to join major league camp for spring training. He inked a minor league deal with Toronto last month.