Colleges Producing Most NFL Players Historically?

Okay, I need some help settling a bet with my buddy: which colleges have produced the most NFL players of all time? We've been arguing back and forth and I'm hoping to find a definitive answer. Is there an up-to-date list somewhere or any resource you could point me towards?

With regards to the argument about which colleges have historically churned out the greatest number of NFL players, a few names routinely appear based on the NFL's database:

1. University of Alabama: The Crimson Tide has been a storied program in college football and has been the alma mater of numerous NFL players.

2. University of Southern California (USC): USC's Trojans have a long conveyor belt sending athletes to the NFL.

3. Ohio State University: The Buckeyes are well known for their football program and their substantial contribution to the NFL.

4. Notre Dame: The Fighting Irish have a well-established tradition in college football, translating into a high number of athletes who have eventually made it to the NFL.

5. University of Miami: Often called "The U", The Hurricanes have a strong history of getting their players drafted into the NFL.

While this list is based on overall output over the years, it's also worth noting that these metrics can shift from year to year, based on different factors such as coaching changes and recruiting classes. College football itself is highly competitive and programs often see rises and declines in their output. I'm afraid I do not have enough data for a more precise ranking, and I do not think there is an "official" resource I can point you to that has live updates. Compiler sites and sports news sources may provide additional context and updates annually.

And remember, these are just total numbers. If you're looking at other statistics, like which colleges produce the most successful NFL players (in terms of Pro Bowl selections or Hall of Fame inductions), the list might look different.