* He's never publicly released a definitive number. While he's mentioned some specific injuries in interviews and documentaries, he hasn't given a complete tally.
* His stunt work is varied and extensive. He's broken bones on numerous occasions throughout his career, from filming for Jackass to other projects.
* Injuries may not always be reported. He might have suffered minor fractures that weren't reported publicly.
So, while we know he's sustained numerous injuries, including broken bones, the exact number remains a mystery!