Barco (elbow) was activated from the 60-day injured list and assigned to Single-A Bradenton on Aug. 3.
He walked two and struck out two while recording just two outs in his first start for the Marauders on Sunday. Barco built up to four innings in his final rehab start in the Florida Complex League, so it's a bit surprising he recorded only two outs in his first Single-A start. He underwent Tommy John surgery prior to getting selected by the Pirates with the 44th overall pick in last year's draft.