In today's Locked on Pirates, Jason Rollison opens up the mailbag to Pittsbugh Pirates fans who want to know the answers to many of their most burning questions, including:

-How concerned should we be with the team's bullpen struggles?

-Can Gregory Polanco keep it up?

-Who won the Gerrit Cole trade, for real?

-When will we see Mitch Keller?

All that and more in this week's Locked on Pirates mailbag! 

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