Re: Bats' pitcher Chapman could be a relief for the Reds
The chronology of events may be telling. On June 15 Fay reported WJ's willingness to trade or sign a reliever. I'm guessing that WJ had made some inquiries before revealing that he was looking.
Around the same time, Jordan Smith is recalled in a move that surprised many.
Around 20 June, Boxberger relieves in Lynchburg. He pitches well and is advanced to Carolina as a reliever.
Around 23 June Fay reports that Chapman will move to the bullpen.
Around the same time Valiquette is advanced to Louisville, even though his performance at Carolina did not seem to merit it.
I speculate that 1) WJ believes the Reds have a good shot if they address the pen, 2) Inquiries revealed that obtaining a quality bullpen arm would cost far more in talent than the Reds were willing to sacrifice, and 3) that the best course of action was to fill the need from within the organization.
Toward that end he was getting some of the best arms in the organization ready to audition for the ML bullpen.