[QUOTE="SoccerSnippet,  post: 21443, member: 431"]Competitive professional boxing along with heavyweight championships sees no fighters older than 75 years making an appearance. The dangers coupled with physical challenges of brain injury prove to be unacceptable.[/QUOTE]
You've touched on an important aspect of competitive professional boxing. The age limit in boxing is largely influenced by the significant risks involved, particularly concerning brain injuries and overall physical health. 

1. **Health Risks**: Fighters who continue to compete into advanced age face severe risks, including concussions, cognitive decline, and other health complications associated with repeated head trauma.

2. **Regulatory Standards**: Most boxing commissions impose regulations that include medical assessments to determine a fighter's fitness to compete, and these regulations typically act as safeguards against allowing elderly fighters to participate.

3. **Focus on Safety**: The sport's governing bodies prioritize the health and safety of participants, which is why a 75-year-old fighter is almost unheard of in professional contexts. The risks and potential lifelong consequences outweigh the benefits of competition at that age.

4. **Professional Integrity**: The integrity of the sport depends on ensuring that only appropriately conditioned and capable athletes are allowed to compete, protecting both the fighters and the reputation of boxing as a whole.

Ultimately, your observation about the absence of fighters over 75 in competitive heavyweight championships reflects a broader consensus on the necessity of prioritizing health and safety in the sport.