In early 2011, Canada's Isabelle Beisiegel became the first female golfer to earn a playing card on a men's professional tour, and she isn't the only female who has demonstrated she can keep up with the boys. Find out more about other amazing boundary-breaking women in sports.

Sport: Hockey

Hayley Wickenheiser may be best known for her success in the Olympics, winning four medals -- including three golds -- for Canada's women's hockey team. She has also played with men in the professional hockey leagues of Europe.

Sport: Tennis

Billie Jean King took on Bobby Riggs in the Battle of the Sexes and won, beating him 6-4, 6-3, 6-3. In addition to the 1973 exhibition win, King picked up 12 Grand Slam singles titles, 16 Grand Slam women's doubles titles, and 11 Grand Slam mixed doubles titles during her career.

Sport: Golf

Alexis Thompson isn't old enough to compete regularly on the LPGA Tour, so she keeps her game sharp by playing against men in South Florida mini-tour events. In February 2011, she beat several dozen male golfers in her hometown of Coral Springs, Fla.

Sport: College football

Katie Hnida never saw game action with her first college team at the University of Colorado, but she went on to become the first woman to score for a Division I NCAA team as a kicker for the University of New Mexico.

Sport: Hockey

Angela Ruggiero made four appearances with the US Women's hockey team in the Winter Olympics, picking up a gold, two silvers and a bronze medal. She also played with the Central Hockey League's Tulsa Oilers in 2005, becoming the first women to play in a regular season professional game in a non-goalie position. Together with her brother, who also played in Tulsa, the duo became the first brother and sister to play professional together.

Sport: Baseball

In 1904, 16-year-old Amanda Clement stepped in to umpire her brother's amateur baseball game. She went on to get paid to umpire semi-professional games for six years, making her the first paid female umpire.

Sport: Basketball

A two-time All-American at Tennessee, Candace Parker led her team to two national championships in 2007 and 2008 under Pat Summitt. In 2006, she became the first female college player to pull off a slam dunk in an NCAA tournament game. As a pro, she became the first WNBA player to win these two top honors in the same year.

Sport: Golf

Michelle Wie burst onto the golf scene in 2000 at age 10, becoming the youngest player to qualify for the U.S. Women's Amateur Public Links Championship. Two years later, she became the youngest player to qualify for an LPGA tournament and has since made several appearances in men's PGA events as well.

Sport: Hockey

Canadian Manon Rheaume became the first woman to play in an NHL exhibition game when she suited up for the Tampa Bay Lightning. She also won gold medals as Team Canada's goaltender at the World Hockey Championships in 1992 and 1994 and a silver with Canada's Olympic team in 1998.

Sport: Drag racing

The "First Lady of Drag Racing" wasn't the first female to battle the boys, but she was one of the most successful. Muldowney claimed 18 event wins and three Top Fuel championships in her career, leading to nationwide media exposure, a movie about her life ("Heart Like a Wheel") and recognition among her peers as "the greatest woman race car driver on the planet."

Sport: Golf

Annika Sorenstam was the No. 1 women's golfer in the world when she accepted an invitation to play in the PGA Tour's Bank of America Colonial tournament. She was the first woman in nearly six decades to have played in a PGA event.

Sport: Basketball

In 1985, Kansas standout Lynette Woodard became the first female player to join the famed Harlem Globetrotters. She played professionally in Italy and Japan, and returned to the states to play for the WNBA's Cleveland Rockers and Detroit Shock in the late 1990s.

Sport: Indy racing

Danica Patrick made her Indy Racing League debut in 2005. Her real breakthrough moment came in 2008, when she won an IRL race in Japan – becoming the first female driver to win a major open-wheel race. She made her NASCAR debut in 2011 and left IndyCar a year later to commit to NASCAR full-time.

Sport: Basketball

Perhaps the greatest figure in women's basketball, Nancy Lieberman took her game to the men's side to see if she could hold her own. She played for the United States Basketball League and for the exhibition Washington Generals. After playing and coaching in the WNBA, Lieberman now coaches a squad of men in the NBA Development League.

Sport: Golf

"Babe" Didrikson Zaharias was a two-time Olympic gold medalist with five world records in track and field when she started playing golf in 1935. She made her PGA debut three years later, and remains the only female golfer to make the cut in a PGA Tour event.

Sport: Horse Racing

Many horse racing enthusiasts are looking to Rosie Napravnik to make major strides this year. In 2012, Napravnik took a major step forward. Riding Believe You Can, Napravnik won the Kentucky Oaks in May, becoming the first female jockey to win the top American race for 3-year-old fillies. Napravnik also won the Breeder's Cup Juvenile in November while riding Shanghai Bobby, joining Julie Krone as the only women jockeys to win a Breeders' Cup race.

Sport: Basketball

One of the most celebrated women's college basketball players, Brittney Griner came out just days after being the No. 1 pick in the WNBA Draft. Griner was dominant at Baylor, setting the single-season blocks record and becoming the all-time leader in blocked shots (736) for men and women. Griner, who was named the Final Four's Most Outstanding Player, led the Bears to a 40-0 mark in 2012 — the most wins in NCAA history.