Complex sentence: Leslie "Les" Hirst is a professional rugby league footballer who played in the 1940s, and 1950s, playing at club level for Wakefield Trinity (Heritage № 582), as a, or, i.e. number 1, or, 3 or 4.
Split into simpler sentences: Leslie "Les" Hirst is a former professional rugby league footballer who played in the 1940s, and 1950s. He played at club level for Wakefield Trinity (Heritage № 582), as a, or, i.e. number 1, or, 3 or 4.