Complex sentence: In 1907 Rowell was switched to defence where he became one of the first truly attacking full-backs-prior to this full-backs did not create run out of defence and acted more like a goalkeeper.
Split into simpler sentences: In 1907 Rowell was switched to defence where he became one of the first truly attacking full-backs. Prior to this full-backs did not create run out of defence and acted more like a goalkeeper.