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Former Arvada West star Roy Halladay might have right stuff for Cooperstown – The Denver Post
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Why the Yankees got annoyed with Mariano Rivera for showing his cutter to Roy Halladay
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Best all-time pitcher for each AL East team – There's no crying in baseball blog
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Rivera's Hall call means more than a plaque
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Rivera, Martinez, Mussina and Halladay elected to Baseball HOF - Sports Collectors Digest
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Blue Jays great was a cutter above thanks to some help from a fellow 2019 HOF classmate
![Baseball Hall of Fame: How Roy Halladay perfected his cutter, thanks to Mariano Rivera](https://upload.wikimedia.org/wikipedia/commons/3/36/Mariano_Rivera_allison_7_29_07.jpg)
Mariano Rivera - Wikipedia
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Mariano Rivera: Mr. Unanimous - Cooperstown Cred
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January 2019 Hall of Fame Inductees
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Mariano Rivera looks back on teaching Roy Halladay his legendary cutter
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Mariano Rivera unanimously elected to Hall of Fame, along with Roy Halladay, Edgar Martinez and Mike Mussina – BBWAA
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Rivera 1st unanimous HOF pick; Doc, Edgar, Mussina also in