Complex sentence: They are currently members of the Western Division of the National Football Conference (NFC), and joined the NFL in 1976, though in the American Football Conference (AFC), as an expansion team along with the Tampa Bay Buccaneers.
Split into simpler sentences: They are currently members of the Western Division of the National Football Conference (NFC). They joined the NFL in 1976, though in the American Football Conference (AFC), as an expansion team along with the Tampa Bay Buccaneers.