Kirilloff (back) was removed from his rehab assignment with Triple-A St. Paul on Saturday due to a flare-up of soreness in his back, Do-Hyoung Park of MLB.com reports.

EDGE Analysis

Kirilloff managed to get through one game of his rehab assignment that started Friday before experiencing a flare-up. The 26-year-old has been on the shelf since June 18 due to back soreness and nerve issues and his rehab assignment was initially delayed due to an ankle sprain that he's since recovered from. The severity of the setback is unclear, but it will likely push his return date a ways into September.