Eno and DVR discuss several struggling players who may open up opportunities for significant role changes during the second half of the season. Plus, the latest installment of Prospect of the Week & Beer of the Month!

Rundown
-- Opportunities in the Cards' Rotation?
-- Brad Keller as a Reliever Would Be Interesting
-- Concerns About Cal Quantrill, Despite Good Ratios?
-- Looking Forward to a New Closer in Arizona?
-- How Safe is Ryan Pressly?
-- Joe Barlow: Time to Buy?
-- Germán Márquez: Would Teams Still Trade For Him?
-- Jonathan Schoop Replacements?
-- Second-Half Expectations for Max Muncy & Justin Turner
-- Prospect of the Week
-- Beer of the Month

Follow Eno on Twitter: @enosarris
Follow DVR on Twitter: @DerekVanRiper
e-mail: ratesandbarrels@theathletic.com

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