The league sent out a memo, which was obtained by CBS Sports' Jonathan Jones, and in that memo, the NFL let teams know that the one-helmet rule will be phased out following the 2021 season. Under the new rule, teams can add a second helmet option starting in 2022, which means any team that wants to take advantage of the new rule can add an alternate color. Any team that wants to add a second helmet will have to make that decision by July 31 of this year even though they wouldn't be wearing it until 2022.
The one-helmet rule was originally put into place back in 2013 as a way to improve player safety. The NFL's belief was that a worn-in helmet is safer for players to wear than a brand new one that hasn't yet conformed to their head.
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