Welcome to the American Football Q/A Thread!!!
As we have plenty of members here whose only experiences with American football may be limited to only the Eyeshield 21 manga, this is where you can come if you desire more knowledge about the sport.
Venom65437 and I, as quite avid football fans, will be happy to educate anybody who asks their questions nicely. I played as a middle linebacker for a state championship high school football team way back in the day, and keep up with the NFL like there's no tomorrow. It's my favorite sport. Venom's been watching football even longer than me, though, and as a diehard Miami Dolphins fan, he's even gone to NFL games personally.
There may be other members here who are quite knowledgable in the sport happy to answer your questions.
So, if you have any inquiries about any rules, any positions, any play calls, any systems, any players, any teams, whatever comes to mind, fire away.
Important: Rules are slightly different between the NFL (Professional Football) and NCAA (Collegiate Football). We'll go over the differences if we have to, just don't be confused by it.