Barco (lower body) completed a bullpen session Thursday, Andrew Destin of the Pittsburgh Post-Gazette reports.

Barco, who has logged 62 innings in his first full season since undergoing Tommy John surgery in 2022, was placed on the development list for High-A Greensboro on Tuesday.

Barco (elbow) was activated from the 60-day injured list and assigned to Single-A Bradenton on Aug. 3.

Barco (elbow) began a rehab assignment in the rookie-level Florida Complex League on July 20 and has turned in a 1.00 ERA, 0.67 WHIP and 12:2 K:BB across nine innings over his first three appearances.