My thoughts are with you and your family, John. Your dad sounds like a great guy. I can only imagine myself in your shoes, and realize just what you must be going through. It's touching to read that you and your brothers were all at his side.
I have a similar relationship with my father. Sports being our common bond as long as I can remember. Going to Seahawks, Sonics, Mariners, and Husky games. Talking about them on the phone when there's not a ton otherwise to talk about. Most phone calls start off with "How are you doing?" followed up with discussing the most recent game or big sports related story in the news. Most of my great childhood memories that included just myself and my dad always seem to be centered around sports. Be it going to games or playing at the park. I'm sure my dad and I would still have a good relationship without sports to bond around, but I know it wouldn't be the same.
I hope everyone reading this thread who still has loved ones around takes a moment to think about it. Far too often in life, we don't appreciate the people in our lives until it's too late. Again, my heart and thoughts go out to you, John. Losing a loved one is never easy. But to lose something means you had something in the first place. And reading your post, you and your family truly had a special bond.