Curt Flood, seeking free agency, took Major League Baseball to court in 1969. Flood lost his case in front of the Supreme Court in 1972, but pitchers Andy Messersmith and Dave McNally won a landmark case in 1975 that led to free agency in all sports.
Signed into law by President Richard Nixon in 1972, Title IX was challenged in court many times before it was fully implemented years later. The law states athletes can't be denied equal benefits, opening the door for women to participate in sports.
Al Davis vs. NFL
The Raiders owner sued the NFL and won a $60 million judgment that allowed him to move his franchise from Oakland to Los Angeles in 1982.
The beloved heavyweight boxing champion was stripped of his world title, but in 1971 the Supreme Court reversed his draft evasion conviction, which allowed him to return to boxing and regain his title.
Oklahoma-Georgia vs. NCAA
The Sooners and Bulldogs sued the NCAA in 1982 for the right to sell their own television rights.