Wow..... That's just amazing @Invicta , & obviously you are proud of your father as you have good reason to be. That's quite a cool story of your father & his friendship with Mr.Stagg who I never knew about these facts & his innovations & contributions to football , that's awesome cuz I was just schooled on something I've wondered about since I was a kid.  Thanks for sharing & Have a Blessed Sunday...  😉👌