On This Day: Lou Gehrig blasted four home runs

Gehrig vs. Ruth, 1927” Home Run Race

Watch Miguel Cabrera launch home run 489 - Bless You Boys

Lou Gehrig hits four consecutive home runs

A History of Road Series Comebacks - AZ Snake Pit

June 3, 1932: Lou Gehrig hits four home runs, Tony Lazzeri hits for natural cycle - Pinstripe Alley

July 4, 1939: Lou Gehrig says farewell to baseball with 'Luckiest Man' speech at Yankee Stadium – Society for American Baseball Research

April 30, 1939: Lou Gehrig plays his final game with Yankees – Society for American Baseball Research

Red Sox endure tough day at Fenway in loss to Yankees

Judge, Carpenter HR twice, Yanks pound Red Sox 14-1 - Hawaii Tribune-Herald

The history of juiced balls and how today's home run binge fits in - ESPN

Gehrig's Beaning Caused Concussion and Maybe More - The New York Times

1926-1931 Postcard-Back Four-on-One Exhibits Gehrig/Grove/Donahue/Cochrane