Deion Sanders was 'joking' in telling Todd Gurley to not use No. 21 - ESPN
Deion Sanders, Todd Gurley clear up number situation on Twitter
Todd Gurley talks joining Falcons, which number he'll wear - The Falcoholic
Is Deion Sanders out of line telling Todd Gurley not to wear No. 21?
Miller: Jared Goff and Rams kick back Sunday rather than kick butt – Pasadena Star News
The best players to wear every jersey number in NFL history - The Athletic
Todd Gurley Says Deion Sanders Told Him Not to Wear His No. 21 Falcons Jersey, News, Scores, Highlights, Stats, and Rumors
In the NFL, how can an offensive player wear a number 90-99 and thus be ineligible receiver? In the rules 90-99 are ineligible numbers, however, the numbers are for defensive players. - Quora