White Sox' Yermin Mercedes has an unwritten rule: To be himself — always - Chicago Sun-Times
Chicago White Sox's Yermin Mercedes, recently demoted to Triple-A, 'stepping aside' from baseball - ESPN
White Sox Yermín Mercedes Is Breaking Tony La Russa's Unwritten Rules Again - South Side Sox
White Sox Yermín Mercedes Is Breaking Tony La Russa's Unwritten Rules Again - South Side Sox
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White Sox rookie Yermin Mercedes leaving baseball
Yermín Mercedes Breaks the Unwritten Rules of MLB
MLB pitchers have funny responses to unwritten rules controversy
Yermin Mercedes clearly thrilled to be free of Chicago White Sox
No, Tony La Russa is Not to Blame for Yermin Mercedes Stepping Away - On Tap Sports Net
Tony La Russa blasts Yermin Mercedes for homering on 3-0 count with 11-run lead - The Washington Post
Baseball's unwritten rules can be, in a word, baffling