Liga Națională (men's basketball)

Prior to 2018, the men's Liga Națională had 12 teams who played the season in three rounds. The regular season, which began in October, was considered the first round and was played in a normal round-robin, home-and-away format. At the end of the regular season, the top six clubs played a play-off round, while the bottom six clubs played a play-out round. The six teams in the play-off round and the top two in the play-out round qualified for the play-offs, which were played using a knockout format. Since 2014, the quarter-finals, semi-finals, and finals have been best of five. The bottom two teams in the play-out round are relegated to Liga I.

In May 2018, the Romanian Basketball Federation's board of directors decided to entirely reform the system. Liga I was dissolved and the Liga Națională was split into three groups; A, B, and C. Group designation depeneds on performance, financial, and infrastructural criteria.^[1] The regular season remains a round-robin format within each group. In the second round, the top six teams from Group A advance to the Red Group. The teams placed seventh and eighth in Group A, the top three teams from Group B, and the winner of Group C advance to the Yellow Group. Teams placed fourth through eighth in Group B, along with the runner-up from Group C, are assigned to the Blue Group. The teams placed third through eighth in Group C are assigned to the Green Group.^[2]

In the second round of the restructured season, teams in the Red Group keep their points while the Yellow, Blue, and Green Groups all begin with zero points.^[2] In the third round of the championship, the first two teams from the Yellow Group join the Red Group teams for the play-offs, which use a knockout format. The quarter-finals, semi-finals, and finals continue to be best of five. To determine the teams ranked between 5th and 8th place, the best of three system is used. Remaining teams form two eight-team groups to determine their final rankings.^[2]

At least five former Romanian players have been inducted into the European Basketball Hall of Fame.

• Gheorghe Mureșan – initially signed in 1993 with the Washington Bullets and played six seasons in the NBA. He was the tallest player in the league and averaged 9.8 points, 6.4 rebounds, and 0.5 assists. He was named the NBA Most Improved Player following the 1995–96 NBA season. He played for two years with Universitatea Cluj-Napoca.
• Antonio Alexe – played his entire professional career in the Romanian and Hungarian basketball leagues. He was Romanian champion twice with Asesoft Ploiești and once with West Petrom Arad. His career was cut short by his 2005 death in a car accident.
• Constantin Popa – played in Divizia A for BC Dinamo București before joining the University of Miami in the NCAA Division I. He is the tallest player in the history of the school. Though he was drafted by the Los Angeles Clippers in 1995, he did not play in the NBA. He joined the CBA before returning to Europe.
• Cătălin Burlacu – in addition to playing in Romania with West Petrom Arad and Asesoft Ploiești, Burlacu played in the Italian, Estonian, and German basketball leagues. He won the Liga Națională championship with Asesoft Ploiești in 2004-2006, 2008-2010, and 2012-2014.
• Levente Szijarto – spent his career in the Romanian basketball league with West Petrom Arad, U Mobitelco Cluj, and Asesoft Ploiești. He won the championship with Asesoft Ploiești in 2003-2010 and 2012-2014.

• Romanian Women's Basketball League