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He was the last helmetless player , having signed a professional contract with the Bruins before the mandatory cutoff date in 1979 ( then-current players were allowed to remain bare-headed under a grandfather clause ) ; incidentally , MacTavish had worn a helmet in his earliest days as he can be seen wearing one during the aforementioned fight with Rangers fans in 1979 .
 Bruins, MacTavish, Rangers
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bruins, MacTavish, Rangers