Complex sentence: Charnley was the Seasiders' top scorer for nine seasons, and he scored his 100th league goal in only his 156th game--a record only marginally beaten by Harry Bedford--playing his best football alongside Alan Ball.
Split into simpler sentences: Charnley was the Seasiders' top scorer for nine seasons. He scored his 100th league goal in only his 156th game--a record only marginally beaten by Harry Bedford--playing his best football alongside Alan Ball.