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As a result , his slot was taken by Greg Gumbel , who was also the secondary play-by-play man for CBS ( behind Sean McDonough ) during their final season of broadcasting Major League Baseball games in 1993 .
 Greg Gumbel, CBS, Sean McDonough, Major League Baseball
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Greg Gumbel, CBS, Sean McDonough, Major League Baseball