Source, in full
Circa June 1923, on observing a young Lou Gehrig—almost two years prior to commencing his record-breaking consecutive game streak—take batting practice; as quoted in The Babe Ruth Story (1948) by Ruth (as told to Bob Considine), p. 130. In the book, Ruth notes that his statement had evidently given rise to Gehrig's now largely forgotten nickname Buster (the latter having first appeared in print on February 29th, the following year), adding that, despite having long since been eclipsed by such handles as "The Iron Horse" and even "Larrupin' Lou," Gehrig's lesser-known moniker did indeed have its heyday during the early years of his Yankee tenure. (Not surprisingly, this heyday entailed a good deal of Ruth/Gehrig alliteration, along the lines of "The Buster and the Babe" and "the Big Bam and the Boy Buster".)