Jones (lat) threw a bullpen session at PNC Park on Tuesday, Andrew Destin of the Pittsburgh Post-Gazette reports.

EDGE Analysis

Jones did some flat-ground throwing Monday and was then spotted progressing to mound work a day later, which is certainly a good sign as he works his way back from a Grade 2 lat strain. The Pirates will certainly proceed cautiously with the prized youngster, particularly since he was going to have his workload limited somewhat down the stretch, anyway, but this is a big step in his recovery.