On June 6 , 1974 — 1974 – Lee May hits the first “foamer” in team history, a promotion where Dome patrons get free beer for the rest of the night if an Astro belts one out on an even-numbered minute. May hits a second shot for good measure and Larry Dierker tosses a three-hitter in a 4-0 whitewash of the Expos.
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