Mordaunt was educated at
Wellington College, Berkshire, and was a prominent schoolboy cricketer. A right-handed
batsman who bowled right-arm
medium-fast, he made his
first-class debut in 1958 for
Sussex in the game against
Oxford University, scoring 96 in the second innings, when he was
caught trying to hit his fourth
six, which would have given him a century on debut. From 1958 to 1960, Mordaunt played 19 first-class matches for Sussex as an
amateur, his final match for the county coming against
Gloucestershire in the 1960
County Championship. He scored 586 runs for Sussex at a
batting average of 24.41, with five half-centuries and highest score of 96. With the ball he took 19 wickets at a
bowling average of 28.89, with a single
five wicket haul of 5 for 42. Mordaunt left Sussex at the end of the 1960 season. He played his final first-class match in 1964 for
Marylebone Cricket Club against
Ireland. With the MCC he also toured North America in 1959, South America in 1964–65, and North America again in 1967. In 1964 Mordaunt joined the
minor county Berkshire, and made his
Minor Counties Championship debut against
Devon. From 1964 to 1974, he played 40 Minor Counties Championship matches for Berkshire. He made his
List A debut for Berkshire against
Somerset in the 1st round of the
1965 Gillette Cup, scoring 60, including four sixes off the bowling of
Bill Alley, and winning the
man of the match award. He played three further one-day matches for the county, against
Hertfordshire in the 1st round of the
1966 Gillette Cup, against
Gloucestershire in the 2nd round of the same tournament, and finally against Hertfordshire in the
1976 Gillette Cup. In his four one-day matches he scored 144 runs at an average of 36.00, with two half-centuries and a highest score of 60. With the ball he took three wickets at an average of 44.00, with best figures of 3/24. He represented Old Wellingtonians in
the Cricketer Cup between 1967 and 1986. ==Main career==