NFL 100: At No. 66, Earl Campbell's 'sledgehammer running' made him an all-time great - The Athletic
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Earl Campbell's playing days
Earl Campbell's Ripped Jersey Run Made Him The Human Wrecking Ball - FanBuzz
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Earl Campbell--got his autograph when he came into a restaurant I worked at. My sister waited on his table.
Biography Celebrates Texas Football Legend Earl Campbell – Houston Public Media
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