Washington hurlers Bump Hadley and Lloyd Brown combine to whitewash the Tigers in a doubleheader, winning 2 – 0 and 1 – 0.

On August 18, 1929 — Washington hurlers Bump Hadley and Lloyd Brown combine to whitewash the Tigers in a doubleheader, winning 2 – 0 and 1 – 0.

Source:
Baseball Reference August 18
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