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He played all or part of six seasons in Major League Baseball , from 1971 to 1976 , for the Houston Astros , San Diego Padres , and St. Louis Cardinals .
 Major League Baseball, Houston Astros, San Diego Padres, St. Louis Cardinals
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Major League Baseball, Houston Astros, San Diego Padres, St. Louis Cardinals