Reserve clauseCurt 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.
Title IXSigned 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. NFLThe 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.
Muhammad AliThe 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. NCAAThe Sooners and Bulldogs sued the NCAA in 1982 for the right to sell their own television rights. The Supreme Court ruled in Oklahoma's and Georgia's favor in 1984, giving college football an open television market.
Spencer HaywoodAfter leaving junior college, and playing on the 1968 Olympic team, Haywood was the first early entry player. After playing one season with Denver in the ABA, Haywood sued the NBA and won in 1970, allowing him to play in Seattle.
NFL vs. USFLThe USFL sued the NFL in 1986 for anti-trust violations. A jury ruled for the USFL but awarded only $1 in damages, essentially killing the USFL.
Casey MartinHampered by a severe circulatory disorder in his legs, Martin sued the PGA in 2001. The Supreme Court's ruling allowed Martin to ride in a golf cart during tournaments.
Eight Men OutEven though they were banned from baseball for life for allegedly throwing the 1919 World Series, "Shoeless” Joe Jackson and seven other players were found not guilty in court.
Piazza sues MLBVince Piazza, father of the All-Star catcher, sued Major League Baseball in 1993 to try and buy the San Francisco Giants and move the team to Tampa, Fla. Piazza dropped the case when MLB paid Piazza a $6 million settlement. By Mike Baldwin