Royals' Kris Bubic: Rehab assignment extended

Bubic (elbow) had his rehab assignment extended by 10 days Thursday, Anne Rogers of MLB.com reports.

While Bubic was nearing the end of his 30-day rehab window, Rogers notes that the 10-day extension is an exception available for pitchers coming back from Tommy John surgery. Bubic made his eighth rehab start with Triple-A Omaha on Wednesday, throwing four scoreless innings while striking out four.