Michael Jordan is the highest-paid athlete of all-time, according to a study from Sportico. Jordan's inflation-adjusted earnings put him at $3.75 billion.

LeBron James ranks fifth at $1.76 billion or $1.36 billion when not adjusted for inflation. 

Ahead of James in the top-5 are Tiger Wood, Cristiano Ronaldo and Arnold Palmer.

Behind James in the top-10 are Jack Nicklaus, Lionel Messi, David Beckham, Roger Federer and Floyd Mayweather.

Earnings include salaries, bonuses, prize money, purses, endorsements, licensing, royalties, memorabilia, book deals, media, appearance fees and golf course design fees. The salary components do not include deferred compensation until it is paid out.

Out of Sportico's top-50, 12 are current or former NBA players (all totals below adjusted for inflation): 

• Michael Jordan (1), $3.75 billion
• LeBron James (5), $1.7 billion
• Shaquille O'Neal (13), $1.21 billion
• Kobe Bryant (14), $1.09 billion
• Kevin Durant (17), $955 million
• Stephen Curry (21), $770 million
• Magic Johnson (34), $645 million
• Kevin Garnett (39), $635 million
• Russell Westbrook (42), $620 million
• Chris Paul (44), $575 million
• James Harden (45), $570 million
• Dwyane Wade (47), $565 million