NFL jersey number restrictions could change for running backs, receivers, tight ends, linebackers, defensive backs
NFL likely to pass rule allowing more single-digit jersey numbers
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Jets' Mekhi Becton has a new number in mind if the NFL changes its jersey rules
College football - Wikipedia
Jets' Mekhi Becton has a new number in mind if the NFL changes its jersey rules
New NFL jersey numbers, explained: What to know about league's rule change for 2021
NFL Relaxes Restrictions on Jersey Numbers - The New York Times
NFL Rulebook NFL Football Operations
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USFL rules: 3-point conversions, two forward passes, biggest NFL differences