Complex sentence: The move was seen as a loss to the Bulls, but at the end of his first season with Leeds, Lensing exercised the opt-out release clause in his contract and was aggressively recruited by the Sharks.
Split into simpler sentences: The move was seen as a loss to the Bulls. However, at the end of his first season with Leeds, Lensing exercised the opt-out release clause in his contract and was aggressively recruited by the Sharks.