Roger Maris' time with the Yankees ends when he is traded to the St. Louis Cardinals. - Pinstripe Alley
Roger Maris Stats & Facts - This Day In Baseball
Roger Maris dished true feelings to The Post after breaking record
April 13 in Cardinals History - History of Cardinals
New York Yankees Retired Numbers - Sports Illustrated
Roger Maris Stats & Facts - This Day In Baseball
Roger Maris: Against All Odds
Remembering the life and career of Roger Maris – New York Daily News
MLB The Wild shamrock
This Day In Baseball April 13 - This Day In Baseball
Roger Maris dished true feelings to The Post after breaking record
Roger Maris' time with the Yankees ends when he is traded to the St. Louis Cardinals. - Pinstripe Alley
Fan Who Caught Maris's 61st Homer Visits Yankee Stadium - The New York Times
Remembering October 1, 1961 Yankee Stadium Maris HR# 61
St. Louis Cardinals team ownership history – Society for American Baseball Research