For Various Reasons, N.F.L. Players Do Not Wear Cups - The New York Times

N.F.L. Signs Media Deals Worth Over $100 Billion - The New York Times

Does Soccer Still Need Headers? - The New York Times

The 101 Greatest NFL Players by Uniform Number: 50-59

The N.F.L.'s Incredible Shrinking Pads - The New York Times

Kendall Fuller supports anti-LGBTQ group with NFL's My Cause My Cleats - Outsports

N.F.L. Players Say They Were Shortchanged on Disability Benefits - The New York Times

Why do NFL players not wear protective cups? - Quora

A New Era of Soccer Moms Navigates a Rapidly Changing Game - The New York Times

The NFL's best players by uniform number: 00–49 - Sports Illustrated

World Cup: Lionel Messi's World Cup Magic Continues in Argentina's Romp Over Croatia - The New York Times

Novak Djokovic to Play at U.S. Open After COVID-19 Policy Change – SportsTravel

Without Updated Tools, NFL Is Still Finding Concussions Too Late - The New York Times

Column: Gloves in NFL have gained popularity but use is largely unregulated - Los Angeles Times

New NFL jersey numbers, explained: What to know about league's rule change for 2021

Notable Players to Wear No. 4