Howard Hansen worked one National League game as a replacement umpire when the regular umps went on a one-day strike on August 25, 1978. He saw more action in 1979, when the umpires went on a more prolonged strike at the beginning of the season, leading him to work in 14 games. All of his appearances were at the Astrodome in Houston, TX, so he was presumable from that area.
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