In 1972, Rich Products signed a 25-year, $1.5 million deal, by which the venue would be called "Rich Stadium"; this is one of the earliest examples of the sale of naming rights in North American sports. (The name was somewhat of a compromise, after Bills owner and founder Ralph Wilson rejected the name Rich wanted to use, "Coffee Rich Park.")[6] After the original deal expired in 1998, the stadium was renamed in honor of Wilson, after Rich balked at paying a greatly increased rights fee[7], which would have brought the price up to par with other NFL stadiums.
The stop gap was Bills Stadium fwiw, then they changed that to Ralph Wilson. Maybe I'm the only one, but it really amuses me that he named it after himself, especially given how ****ty they've been ever since.