Is the Pirates’ Pitching Depth Still a Trade Advantage?

The Pirates have turned starting pitchers into lineup help in consecutive offseasons, but Alex Stumpf sees a problem with trying it again. The top of Pittsburgh’s rotation isn’t going anywhere, and moving Mitch Keller just to clear salary could create another hole. Meanwhile, Khristian Curtis, Hunter Barco, Wilber Dotel and Antwone Kelly have upside but haven’t established the same trade value as past departures. On Wednesday’s OffBeat, Alex asks whether Pittsburgh’s next step has to come from within.