Thomas David commonly known as Tom or Tommy, was given the nickname "Tom the Bomb", and was noted for his diving, try-scoring prowess, which would be used to great effect in Pontypridd's 1975/76 season. David was a fitter by trade, but would later become a company director. David was a keen rugby player as a youth, and represented his school, Hawthorn Secondary Modern before joining Pontypridd. In 1972 he switched to Llanelli, and was chosen to face New Zealand when the All Blacks played Llanelli as part of their 1972/73 tour. The game saw a historic win for Llanelli, beating New Zealand 9–3. This was the first of two encounters for David against the same touring All Blacks as he also played flanker in the Barbarian side of 1973 who were victorious against New Zealand at Cardiff Arms Park. In between the two victories, the Wales national team also faced the New Zealanders, and many critics felt that David's robust style of play and heavy tackling, which he took to the All Blacks with Llanelli, should have been rewarded with his first internationalcap. David was not selected for the game, and Wales lost the game 19–16. While with Llanelli, David was first selected to represent the Wales national team, in an encounter with France as part of the 1973 Five Nations Championship. Although Wales lost the game, David was reselected for the very next Wales game against Australia who were touring England and Wales. David was forced to pull out of the Wales team for the opening game of the 1974 Championship, against Scotland, through injury. This allowed Pontypool's Terry Cobner to take the open flanker position. Cobner was so successful in this role, that David was kept out of the position until Conber himself was forced to stand down three years later. In 1974, David was selected for the British Lions team to tour South Africa. David played in nine games, but was not selected for any of the Test games against the South African national team. On the tour David scored five tries against the regional teams, including two in the opening game against Western Transvaal. In 1976, despite being a popular figure at Stradey Park, David rejoined Pontypridd. With Pontypridd, David won the Welsh Club Championship in the 1975/76 season, and regained his international place with Wales. His third cap was an encounter away to Ireland during the 1976 Five Nations Championship. Wales had already won the first two matches of the tournament over England and Scotland, and Wales then beat Ireland after a rapid turn around of fortunes thanks to the attacking flair of Phil Bennett. David was then selected for the final Wales' game of the Championship, the title decider at home to France. When Wales won the game 19–13, they not only took the Championship but also the Grand Slam. Although he was now a Grand Slam winning player, David never represented Wales under the union code again. David continued to represent Pontypridd, and in the 1979/80 season he was given the captaincy of the senior team. While at Pontypridd he saw the club win three Welsh Club Championships, in 1976, 1978 and 1979. In 1981 David left Ponty, turning to the professional rugby league code. He joined Cardiff RLFC in August 1981 and on 8 November of that year he represented the Wales national rugby league team in a match against England at Cardiff. He played one final international in 1982, this time a home match to the Australian team.