Gehrig's pro career started four years before he became Yankees
New York Yankees, History & Notable Players
Lou Gehrig, Biography, Statistics, Disease, & Facts
Wally Pipp lost his job to Lou Gehrig 90 years ago Tuesday – Orlando Sentinel
MORE
Whitey Ford, Beloved Yankees Pitcher Who Confounded Batters, Dies at 91 - The New York Times
Judge should be next Yankees captain, teammate Cortes says
Baseball Digest
Lou Gehrig MLB Career and Early Life, The Iron Horse
Luckiest Man: The Life and Death of Lou Gehrig: 9780743268936: Eig, Jonathan: Books
Gehrig legacy one of irony
Ranking Yankees Legends With The Longest Tenures In New York
Yankees Fall, but Jeter Breaks a Gehrig Milestone - The New York Times
Lou Gehrig - Disease, Stats & Quotes
Lou Gehrig left Columbia for the Yankees because of financial pressure - The Washington Post
Lou Gehrig, Biography, Statistics, Disease, & Facts