Brett Favre was the only grandfather to play in the NFL before Philip Rivers signed

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Brett Favre: Became a grandfather in 2010 while playing his last season with the Minnesota Vikings, making him the first known active NFL player to hold the title. 

Philip Rivers: Signed with the Colts in December 2025, becoming the second known player to be a grandfather while on an NFL roster and potentially the first to play a game as one.

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How many grandfathers we have here at FFT?