The Most Important Athletes of All Time: Who Changed Sport

In 1936, Jesse Owens ran and jumped his way to four gold medals in Berlin, in a stadium built to showcase Nazi racial theory, with Hitler watching from the stands. No trophy case captures what that moment did. That’s the gap this list is trying to name: the difference between winning a lot and actually changing something.

Greatness and importance aren’t the same thing in sport. Plenty of athletes have swept every trophy on offer and left barely a mark outside their own discipline. The names below did something different — they moved how people thought about race, gender, class, or what a human body could do.

The Criteria for Importance

A few things separate importance from a strong career record.

• Being first. The athlete who broke into a sport or league that had excluded people like them.
• Reach well past the fanbase, into people who never watched the sport.
• Using a platform to push for change, sometimes at real personal cost.
• Staying relevant decades after the last game or match.
• Recognition that crosses borders, not just national fame.

A Framework: Categories of Impact

Category	Example Athletes	What They Changed
Racial barriers	Muhammad Ali, Jesse Owens, Jackie Robinson	Proved Black athletes could compete and excel at the highest level
Gender equality	Billie Jean King, Serena Williams, Mia Hamm	Expanded women’s access to sport and equal treatment
National identity	Pelé, Sachin Tendulkar, Roger Federer	Became symbols of their nations on the world stage
Physical possibility	Michael Jordan, Michael Phelps, Usain Bolt	Redefined the ceiling of athletic performance
Social advocacy	Colin Kaepernick, Martina Navratilova	Sacrificed personal careers for broader causes

Athletes Who Stand Apart

Muhammad Ali tops nearly every version of this list, and not just for what he did in the ring. He refused the draft during Vietnam, converted to Islam publicly, and spoke with a charisma that made him the most politically significant sportsperson of the last century, boxing skill aside.

Jesse Owens’ four golds at the 1936 Berlin Olympics did more than win medals. They undercut Nazi claims about racial superiority in front of the regime that was making them, in real time, on their own turf.

Jackie Robinson broke Major League Baseball’s colour line in 1947 and kept performing at an elite level while absorbing abuse that would have broken most people. What he opened stretched well past baseball.

Billie Jean King beat Bobby Riggs in the 1973 “Battle of the Sexes” and spent years afterward fighting for equal prize money, work that reshaped the economics of women’s sport.

Pelé gave Brazil, and football more broadly, an identity that needed no translation. Sachin Tendulkar became something close to a religious figure for over a billion cricket fans in India. Neither is just a great player. Both are institutions at this point.

Why “Importance” Defies a Single Ranking

There’s no ranking here that survives contact with a different country’s perspective, because importance depends on where you’re standing. Ali’s impact reads differently in the United States than Tendulkar’s does in India or Pelé’s does in Brazil. What connects them is the size of the audience each one reached outside the scoreboard.

That influence also builds over time rather than fading. Robinson’s legacy grew substantially after he died. Ali still shapes how a generation of activists think about using a platform. Serena Williams changed what young girls, across backgrounds, believed was possible for them.

Overlooked Names Worth Considering

• Babe Didrikson Zaharias dominated multiple sports at a time when women were actively pushed away from competing seriously.
• Arthur Ashe won Wimbledon and then used that platform for HIV awareness and racial justice.
• Nadia Comaneci became the first gymnast to score a perfect 10, resetting what people thought precision in the sport could look like.