PITTSBURGH -- Pirates veteran right-hander A.J. Burnett started light throwing Saturday, injured infielders Josh Harrison and Jordy Mercer are expected to start rehab assignments Tuesday, and relief pitcher Rob Scahill (right forearm tightness) will report to Pirates trainers Monday before throwing three innings for Double-A Altoona the following day.
Burnett (right flexor strain) was placed on the 15-day disabled list last week after undergoing an MRI and receiving a platelet-rich plasma (PRP) injection on Monday.
When diagnosed, it was expected that Burnett, who also threw Sunday, would miss approximately four weeks.