A Houston Oilers helmet signed by legendary 1970s coach Bum Phillips and several players achieved $2m at a recent charity auction, making it the most expensive piece of football memorabilia ever sold.
Phillips was coach during the Oilers' most successful period, when they reached two successive AFC championship games between 1978 and 1979.
Famed for wearing his stetson on the sidelines, Phillips is one of the game's most charismatic figures and clearly remains popular with memorabilia investors.
The fight for the helmet was won by lawyer Steve Mostyn, who outbid his wife in comical scenes at the charity auction in Beaumont, Texas.
All proceeds are going towards the construction of a new residential facility for disabled children in Port Arthur, Texas, reports KFDM.
In other sporting headgear news, former New Zealand rugby union player Shayne Philpott has decided not to sell his All Blacks cap. The utility back had originally advertised the item online for $2,400 following continued frustration at criticism of his performances for the national team in the early 1990s.