Robert "Rob"/"Bob" Prosser (born 14 November 1943) is a Welsh former rugby union, and professional rugby league footballer who played in the 1960s and 1970s. He played invitational level rugby union (RU) for Crawshays RFC, and at club level for Coventry R.F.C. and Newport RFC, as a scrum-half, i.e. number 9, and representative level rugby league (RL) for Wales, and at club level for St. Helens and Salford, as a stand-off, or scrum-half, i.e. number 6, or 7.