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The Challenges of Evaluating the Pirates Middle Relievers

PITTSBURGH — The Pirates made another transaction Wednesday, calling up Kyle Lobstein as the flavor of the week for bullpen help.

In the month of June, the Pirates have made nine bullpen transactions, shuttling Lobstein, Wilfredo Boscan, Arquimedes Caminero, Cory Luebke, Curtis Partch, Jorge Rondon and Rob Scahill back and forth from Triple-A.

None of that group has set the world on fire at the Major League-level, but they’ve all shown promise at one point or another. The problem hasn’t been so much the results as it has been the volume.

Wednesday’s roster move, as has been the case with many of them, is more a result of Boscan being unavailable after having thrown 68 pitches Tuesday than it is about Lobstein being a superior option.