Complex sentence: Arthur Haigh was a professional rugby league footballer who played in the 1920s, and 1930s, playing at club level for Featherstone Rovers (Heritage № 6), as a, i.e. number 11 or 12, during the era of contested scrums.
Split into simpler sentences: Arthur Haigh was a professional rugby league footballer who played in the 1920s, and 1930s. He played at club level for Featherstone Rovers (Heritage № 6), as a, i.e. number 11 or 12, during the era of contested scrums.