Padres' Jarred Cosart: Heading to extended ST for rehab

Cosart (elbow) received a PRP injection Wednesday and will head to extended spring training to begin his rehab process, AJ Cassavell of MLB.com reports.

The right-hander's first potential return date was this Friday, but that clearly is not going to happen based on the news. Cosart was officially diagnosed with a flexor strain, so he will not begin throwing immediately upon his arrival in Arizona. This pushes his timeline well into the future, although no firm return date has been provided at this time. Look for Miguel Diaz and Dinelson Lamet to remain in the rotation while Cosart misses time.