William Matthew O'Halloran (18 June 1934 – 13 December 1994) was an Australian cricketer. He played six first-class cricket matches for Victoria between 1962 and 1964.^[1]

The son of Tom O'Halloran, and the (later) Mrs. C.S. Hayes,^[2][3] William Matthew O'Halloran was born at Corowa, in New South Wales on 18 June 1934.

He married Joan Beverley Rowland (1936–2021) in 1957.^[4]

He attended Caulfield Grammar School from 1950 to 1953,^[5][6] where he excelled as both a cricketer and as a footballer.^{[7][8][9][10][11][12]}

He later returned to the school as a member of staff: teaching there from 1958 to 1959, and from 1963 to 1966.^[13]

He attended the University of Melbourne from 1954 to 1956.^[14] He graduated Bachelor of Commerce (B.Comm) on 20 March 1957.^[15]

He played amateur football for Old Caulfield Grammarians in the Victorian Amateur Football Association (VAFA) over many seasons;^[16] and was named as an interchange in the club's "Team of the Century".

In December 1956 he played for Melbourne University against Adelaide University, taking 6/41.^[17]

A left-hand bat, and a right arm medium-pace bowler, he played in 218 First XI District Cricket matches, with St Kilda (192 games)^[18] and University (26 games) over 21 seasons — 1953/54 to 1973/74 — scoring 5,368 runs (av. 30.32) and taking 312 wickets (at 17.34).^{[19][20][21][22][23][24]}

He also played in six representative matches for Victoria, scoring 115 runs (av. 12.77) and taking 4 wickets (at 50.50) — in one of those matches taking 2/26^[25] — over two consecutive cricket seasons: 1962/1963, and 1963/1964.

• 1962: Victoria vs. M.C.C., MCG, December 1962.^[26]
• 1962: Victoria vs. New South Wales, MCG, December 1962.^[27][28]
• 1963: Victoria vs. South Australia, Adelaide Oval, January 1962.^[29][30]
• 1963: Victoria vs. Western Australia, WACA, Perth, January 1962.^[31][32]

• 1963: Victoria vs. South Australia, MCG, November 1963.^[33][34]
• 1963: Victoria vs. Western Australia, MCG, November 1963.^[35][36][37]

• List of Victoria first-class cricketers
• List of Caulfield Grammar School people

• Webber, Horace (1981). Years May Pass On... Caulfield Grammar School, 1881–1981. Centenary Committee, Caulfield Grammar School, (East St Kilda). ISBN 0-9594242-0-2.
• Wilkinson, Ian R. (1997). The Fields At Play – 115 years of sport at Caulfield Grammar School 1881–1996. Playright Publishing. ISBN 0-949853-60-7.

• William O'Halloran at ESPNcricinfo