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Rojas pitched for two seasons in the Marlins ' system — including service with the Triple-A Charlotte Knights for eight games — before injuries ended his active career .
 Rojas, Marlins, Charlotte Knights
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rojas, Marlins, Charlotte Knights