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Why do so many NFL (pro football) players have charities?
In addition to tax-related benefits, one answer may be that it helps them avoid being inundated with requests to support other foundations. Most charities have access to public records that indicate potential donors based on income and demographic. They can use that info to solicit for donations. "Hey NFL Player, you have lots of money, and we have cute starving emus that really need your help!" Here's a blurb from Foundation Source about some of the benefits to starting your own foundation.  Get an Immediate Tax Deduction, but Give Later: You get the tax deduction when the foundation is funded, then make your charitable   gifts over time. Leave a Lasting Legacy: Foundations set up in perpetuity can burnish your name far beyond your lifetime. Because gifts are made   from an endowment that generates investment revenue, the total gifts   made by the foundation can far surpass the actual funding. Be Taken More Seriously as a Philanthropist: A foundation imparts a gravitas that causes people to take your philanthropy more seriously,   due to the structured, organized approach you employ for your giving. Sidestep Unsolicited Requests: When you focus your foundation on specific giving areas, your mission statement can be used to politely   turn down off-target funding requests. Deepen and Focus Your Philanthropy: Whereas individual donors often spread their giving among as many causes as possible, the formalized   structure of a foundation often encourages donors to narrow their   focus to specific causes. Build a Better Family: As family members take on philanthropic research, present their findings to the board, participate in the   decision-making process, and track results, they hone skills that will   serve them for years to come. Tax-Deductible Grants to Individuals in Need: A private foundation allows you to provide emergency assistance directly to individuals   using dollars for which you’ve already received a tax deduction. Run Charitable Programs Without Setting Up a Separate Nonprofit: Direct charitable activities are IRS-approved programs that permit   foundations to directly fund and carry out their own projects. Pay Charitable Expenses: All legitimate and reasonable expenses incurred in carrying out the foundation’s charitable mission can be   paid by the foundation and will count toward the annual minimum   distribution requirement. Provide Loans Instead of Grants: When used to support a charitable purpose, private foundations can employ loans, loan guarantees, and   even equity investments, which are paid back (potentially with   interest), so you can recycle your philanthropic capital for other   charitable causes. https://www.foundationsource.com/resources/library/top-10-advantages-of-a-private-foundation/ There's a similar list here on the website for an attorney that specializes in philanthropy and non-profits. I won't copy/paste that list as it's similar, but I wanted to provide an additional source confirming the above benefits. This link contains some disadvantages as well.  http://www.hurwitassociates.com/l_start_pros.php