List of Major League Baseball records considered unbreakable - Wikipedia
Baseball's 10 Most Unbreakable Records, News, Scores, Highlights, Stats, and Rumors
Baseball's 'Iron Man' Cal Ripken Plays Not My Job : NPR
EIGHTY-FIVE YEARS AGO, A 23 YEAR OLD PITCHER SET A MAJOR LEAGUE RECORD THAT WILL
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The Streak: Lou Gehrig, Cal Ripken Jr., and Baseball's Most Historic Record
Baseball records that will never be broken
Lou Gehrig - Wikipedia
25 years later: An oral history of the night Cal Ripken Jr. became the Iron Man - The Athletic
Baseball records that will never be broken
Baseball's 10 Most Unbreakable Records, News, Scores, Highlights, Stats, and Rumors
Baseball records that will never be broken
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