Thank you for your question! Yes, it appears that with the strategy you are using, you will get the results you are looking for only by separating your NFL list into the different sections you are interested in (probably by team based on my understanding of your use case).
Note: even though the product you are using is discontinued, the LITI syntax is alive and well at SAS. We use it for information extraction (concept and fact extraction) and it still integrates with the categorization syntax. There is a book on the LITI syntax that may be useful to you published by SAS Press. Here is a link on Amazon (it is also available on O'Reilly and through your SAS representative): https://www.amazon.com/SAS-Text-Analytics-Business-Applications-ebook/dp/B07QC3S58F/ref=sr_1_1?keywords=Teresa+Jade&qid=1555095723&s=books&sr=1-1
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