Juan Marichal won 20+ games in six different seasons and finished

Who was the last Major League Baseball pitcher to both win and lose at least 20 games in the same season? - Quora

MLB - Extraordinary character, community involvement

Juan Marichal won 20+ games in six different seasons and finished his career with 243 wins. “The Dominican Dandy” was elected to the Hall…

Juan Marichal, Biography, Teams, & Facts

One wild record you probably didn't know for all 30 MLB teams - ESPN

Baseball Roundtable Rates the Top 25 MLB Debuts - Baseball Roundtable

July 19, 1960: Juan Marichal shines in Giants debut with one-hit shutout and 12 strikeouts – Society for American Baseball Research

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Mike Mussina vs. Current Hall of Fame pitchers: A comparison - Pinstripe Alley