A total of 22 teams contest the league, 15 of which returned from the 2008–09 season, four of which have been promoted from Lega Pro Prima Divisione, and three relegated from Serie A.
The list does not include Giuseppe Giannini's resignation from Gallipoli, who were announced on February 8, 2010[50] and withdrawn two days later following a meeting with club chairman Daniele D'Odorico.
[53] An analogous one-point penalty involving Ancona was ratified by the National Disciplinary Committee on 18 February 2010 due to not having paid a number of salaries in June and July 2009;[54] such deduction was extended to two points by the Federal Court of Justice later on 12 March.
[55] The season also experienced a suspension for the 3 March match between Cesena and Sassuolo, which was not completed due to heavy snow at the 73rd minute, with the result being 0–0.
[57] Salernitana were also the first team to get mathematically relegated, after a 5–2 loss to Empoli left the Campanian club with a 23-point gap between them and 19th-placed Padova with seven games to the end of the season.