The "southpaw advantage" is more than just a boxing superstition. Fighting with a dominant left hand has helped some of the sport’s fiercest competitors rise to the top of their class. Here are 20 boxers who assumed the southpaw stance.

1. PERNELL WHITAKER

Pernell Whitaker launched his career at the 1984 Los Angeles Olympics when he defeated Cuban fighter Luis Ortiz (a fellow southpaw) to take home the gold. As a professional he claimed the world champion title in four weight classes: lightweight, light welterweight, welterweight, and light middleweight. Popular boxing magazine The Ring declared him the best boxer in the world pound-for-pound for a period in the 1990s.

2. MANNY PACQUIAO

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One of the best boxers of the 21st century also may be the most famous southpaw of all time. The Filipino athlete has racked up numerous distinctions over his career: He’s the first and only eight-division world champion, the first boxer to earn the lineal title across four weight divisions, and the first to win 10 world championships in eight classes. After achieving all that, he took a break from boxing to become a senator in the Philippines.

3. MARVIN JOHNSON

Marvin Johnson made a name for himself at the 1972 Munich Olympics, where he won a bronze medal boxing for the U.S. team. After returning to the States, he broke into the professional circuit and gained a 43-6 record during his 15-year career. He told his local Indianapolis news station in a 2008 interview, "Not trying to sound boastful, but I would describe myself as one of the best in the ring during my time."

4. TIGER FLOWERS

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Theodore "Tiger" Flowers entered the professional boxing ring at a time when the sport was still segregated in America. He broke racial barriers in 1926 when he became the first black man to earn the world middleweight title. Flowers is also credited for helping make integrated audiences a more common sight at boxing matches.

5. RAFAEL LIMÓN

Born in Mexico in 1954, Rafael Limón won world titles in the super featherweight division. His performance in the ring earned him the volatile nickname “Bazooka.”

6. ADA VÉLEZ

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Ada Vélez became the first Puerto Rican boxer to secure a women's world boxing title in 2001. In this case, it wasn’t her southpaw that gave her the winning advantage—the champion she unseated, Kathy Williams, is also a leftie.

7. LEW TENDLER

He may have never won a world title, but that didn’t stop Lew Tendler from becoming a boxing legend. The athlete ascended to prominence in the 1920s, a golden age for boxing in the United States. Today he’s immortalized in the International Jewish Sports Hall of Fame and the International Boxing Hall of Fame.

8. YOUNG CORBETT III

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Born Ralph Giordano in Italy, Young Corbett III was most famous for holding the world welterweight title for a short stint in 1933. Of the 151 professional matches he fought in the 1930s and '40s, he came out victorious in 123.

9. CARMEN BASILIO

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Italian-American athlete Carmen Basilio is best known for his matches against boxing legend Sugar Ray Robinson. He won the first of the storied fights in 1957. He was challenged to a rematch in 1958, and the second time, Robinson came out on top. After relinquishing his middleweight champion title to the victor, Basilio boxed only occasionally before retiring for good.

10. MARVELOUS MARVIN HAGLER

In 1987, Marvelous Marvin Hagler (his legal name) was the most formidable name in boxing. The American boxer was riding high on a seven-year reign as middleweight world champion, one of the longest streaks the class has ever seen. After defending his title 12 consecutive times, he made headlines for a different reason: losing to Sugar Ray Leonard in one of the most anticipated fights of the decade.

11. JACK PETERSEN

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Jack Peterson was 18 years old when he reached the finals of the Welsh Amateur Boxing Association in the late 1920s. He returned the next year to win two titles (he also claimed a title from the British Amateur Boxing Association that same year). After going professional, Jack Petersen earned his place in history as the first Welshman to be crowned British heavyweight champion.

12. OSCAR DE LA HOYA

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Mexican-American boxer Oscar De La Hoya represented the U.S. at the 1992 Barcelona Olympics when he was still a teenager. Earning gold in the featherweight division was just the start of his decorated career. From there he earned world titles in six different weight classes and became the top-earning pay-per-view athlete of his day.

13. CHRIS BYRD

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There was a second southpaw competing for the U.S. at the Barcelona Olympics. During the 1992 games Chris Byrd took home the silver medal in the middleweight division. In the years to follow he rose to the ranks of two-time heavyweight world champion.

14. HECTOR CAMACHO

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Hector "Macho" Camacho’s quick punches and fancy footwork helped him bag world titles across multiple weight classes in the 1980s and early '90s. He was known for his flashy brand of showmanship: Some of the outfits he wore in the ring included a Roman gladiator costume and a monogrammed fur robe.

15. HOLLY HOLM

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As a boxer, Holly Holm has earned and defended world champion titles many times over. She’s also known for being one of the few fighters to defeat superstar Ronda Rousey in the mixed martial arts ring.

16. GUILLERMO RIGONDEAUX

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Cuban boxer Guillermo Rigondeaux is the current holder of the super bantamweight world title. He's also the owner of two Olympic gold medals—one he received in 2000 and the other in 2004.

17. SERGIO MARTINEZ

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From 2010 to 2014, Argentine boxer Sergio Martinez dominated as champion in the lineal middleweight division. He officially retired one year after losing the honor to Miguel Cotto.

18. REGGIE JOHNSON

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One of only eight men to win a world light heavyweight title after earning a title in middleweight, Reggie Johnson was one of boxing’s brightest stars in the late 1990s. He lost his light heavyweight title to Roy Jones Jr. in 1999, but even his rival had nothing but respect for the native Texan. Jones spoke of him to The Ring: “You won’t find a better person than Reggie Johnson in boxing.”

19. VICENTE SALDIVAR

Vicente "Southpaw" Saldivar is famous for more than his left-sided fighting stance. The Mexico City native competed in the 1960 Olympics, held world featherweight titles, and fought before massive crowds. He was inducted into the Boxing Hall of Fame in 1999.

20. ERISLANDY LARA

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The junior middleweight world title currently belongs to Erislandy Lara. He adopted the nickname "The American Dream" after defecting from Cuba, and in early 2017 the boxer became an American citizen.