Bob Keselowski -- former ARCA Menards Series champion and father Brad and Brian Keselowski -- has died after a battle with cancer, the family announced on Wednesday.
He was 70 years old.
Brad confirmed the news in an emotional post ... saying, "My dad will always be my hero. He was quiet and understated, but that didn’t change the impact he had on me or that I watched him have on everyone who knew him."
"I am forever grateful for what I learned from this man, and I will remember him every day.