While studying at
Brasenose College, Oxford he played
first-class cricket for
Oxford University, making his debut against
Worcestershire at
Oxford in 1951. He played first-class cricket for Oxford until 1953, making sixteen appearances. Marshall scored a total of 710 runs in his sixteen matches, at an
average of 26.29 and a high score of 111. This score, which was his only first-class
century, came against the
Free Foresters in 1953. His brother,
David, also played first-class cricket. ==Teaching career==