Career
International honours
County honours
Championship final appearances
Bill Mercer played centre, id est (that is) number 3, in Saint Helens" 9-5 victory over Huddersfield in the Championship final during the 1931-1932 season at Belle Vue, Wakefield on Saturday 7 May 1932. County League appearances
Bill Mercer played in Saint Helens" victories in the Lancashire League during the 1929-1930 season, and 1931-1932 season. Challenge Cup final appearances
Bill Mercer played centre, id est (that is) number 4, in Saint Helens" 3-10 defeat by Widnes in the 1929-1930 Challenge Cup final at Wembley Stadium, London on Saturday 3 May 1930.
Club career
Bill Mercer made his début for Saint Helens in the 15-3 victory over Batley at Knowsley Road on Saturday 26 September 1925, and scored his first try in the 55-6 victory over Bradford Northern at Odsal Stadium on Wednesday 14 April 1926, his final match was the 7-25 defeat by Warrington at Knowsley Road on Saturday 6 November 1937.
Bill Mercer did not play in Saint Helens"s 10-2 victory over Widnes in the 1926 Lancashire Cup final during the 1926-1927 season on Saturday 20 November 1926, George Cotton, and Alf Ellaby played as wings, Alf Frodsham, and George Lewis played as centres, and Les Fairclough played as stand-off/five-eighth.