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Professional career Mattews turned professional under manager Dean Chance , and was a stablemate of heavyweight contender Earnie Shavers and lightheavyweight contender Ray Anderson .
 Dean Chance, Earnie Shavers, Ray Anderson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dean Chance, Earnie Shavers, Ray Anderson