Clifford "Cliff" Lambert (birth registered first ¼ 1930), also known by the nickname of "Slam", is an English former professional rugby league footballer who played in the 1940s, 1950s and 1960s. He played at club level for Featherstone Rovers (Heritage № 308) (vice-captain), and Hunslet, as a second-row, or loose forward, i.e. number 11 or 12, or 13, during the era of contested scrums.