Complex sentence: He often found himself in conflict with swimming officials and threatened with suspensions, before finally ending his international career after being suspended for drinking 46 cans of beer on a return flight to Australia after the 1986 Commonwealth Games.
Split into simpler sentences: He often found himself in conflict with swimming officials and threatened with suspensions. His international career ended after his being suspended for drinking 46 cans of beer on a return flight to Australia after the 1986 Commonwealth Games.