NFL Studying Helmet Face Guard That Works Like Surgical Mask – NBC4 Washington
NFL, players still haggling over coronavirus testing, other issues
NFL news: NFLPA President JC Tretter speaks out on pandemic
Analysis: How the NFL got through the pandemic and to 2021
JC Tretter says Browns 'have done a really great job' with COVID-19 protocols, continues work for player safety
Browns center and NFLPA president JC Tretter's next fight: More natural grass
COVID-19 puts NFL, college, high school football in danger this fall
NFL 40 under 40: How football's youngest power brokers are changing the game on and off the field - The Athletic
Closing time: Roethlisberger eyes goodbye as Browns visit
JC Tretter says Browns 'have done a really great job' with COVID-19 protocols, continues work for player safety
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
As NFL playoffs approach, Cleveland Browns encounter more coronavirus issues - The Washington Post
Browns: J.C. Tretter advocating for OTA boycotts shouldn't affect team