Complex sentence: In the AFC Central Division rival games, the Browns won on opening day in a defensive gem over the Steelers 13-3, but then the Browns lost their remaining five AFC Central games outscored by combined totals of 183-64.
Split into simpler sentences: In the AFC Central Division rival games, the Browns won on opening day in a defensive gem over the Steelers 13-3. They lost their remaining five AFC Central games however, being outscored by a total of 183-64.