Description in May 1923 of the baseball defensive strategy used against Cy Williams, a notable power hitter of the era.
Billy Evans (1884–1956)
The Sacramento Star of 24 May 1923, on page 8 via <a rel="nofollow" class="external free" href="https://www.newspapers.com/clip/105509622/cy-williams-defensive-shift/">https://www.newspapers.com/clip/105509622/cy-williams-defensive-shift/</a>