The Pirates have a promising bullpen right now. They've seen good results from Kyle Crick, Edgar Santana, Richard Rodriguez, and a few others. They have all of those guys under team control through at least the 2023 season. They have Felipe Vazquez under team control through 2023 as well.
An optimistic view of the current situation says that the Pirates could be set for a long time with a very talented bullpen.
But there's a reason why that should only be an optimistic view, and not yet a realistic view, despite the good numbers. That reason: Michael Feliz.