S.L. Benfica 2015, Benfica reported to have 246,401 members; however, after a scheduled renumbering by the club in August 2015, the number decreased to 156,916. In April 2017, Benfica reported they had a total of 184,264 members by 31 December 2016. Benfica has rivalries with Sporting CP and FC Porto, with whom it forms the "Big Three": Portugal's most decorated clubs. None of them have been relegated from the Portuguese league since its establishment in 1934. As Lisbon-based clubs, Benfica and Sporting have shared a rivalry for over a century; it all started in 1907 when eight prominent Benfica players defected to
1974–75 S.L. Benfica season Rui Rodrigues and Zeca. After a lengthy pre-season, Benfica started their campaign with two victories against Belenenses and Farense. They dropped points in the third week, before winning the following two matches, reaching first place. In October, they drew with Boavista and lost at home to Porto, falling to third place. Four consecutive wins followed, until three draws in December cost them first place. Benfica lapped the first part of the season with a three-point deficit to Porto, but managed recover that in January. A draw in early February, with Académica de Coimbra stopped them, but the team reacted with