In the case of married segments, technically yes, but in that case "reprice" would mean repricing EWR-SFO in YN.

It's a deliberate decision by RM that they only want to sell XN inventory on the p.s. flights to int'l connecting pax. That being said, I'm not sure why the connecting itinerary has J6 and the last segment alone is J5 unless they're blocking a seat for connections. I suppose it's possible.