Complex sentence: Former team mates Jack Charlton, Allan Clarke and Johnny Giles all spoke up for Bremner, as did Wolves player Derek Dougan, who had scored against Leeds in the match in question.
Split into simpler sentences: Former team mates Jack Charlton, Allan Clarke and Johnny Giles all spoke up for Bremner. So did Wolves player Derek Dougan, who had scored against Leeds in the match in question.