White Sox sign lefty Aaron Bummer to five-year extension - Chicago

Aaron Bummer Receives Five-Year Extension from the Chicago White Sox - Last Word On Baseball

White Sox Extend Bummer's Contract

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White Sox Sign Aaron Bummer, Leury Garcia To Contract Extensions

Aaron Bummer, Leury Garcia get new contracts from the White Sox on Saturday

An increase in velocity helps explain why White Sox lefty Aaron Bummer has emerged as one of the AL's nastiest relievers

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White Sox make several roster moves: Aaron Bummer to IL, Mercedes DFA'd – NBC Sports Chicago

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Breaking: White Sox, Aaron Bummer sign five-year extension

Aaron Bummer reportedly signs extension with White Sox