For the 1982/3 season Reardon returned to number one in the world rankings, which at the time was based only on performances at the World Championships over previous years. He won the Professional Players Tournament in late 1982, beating Jimmy White 10–5 in the final, reached the final of the Benson &amp; Hedges Masters, losing 7–9 to Thorburn, and went on to win the 1983 International Masters, where he defeated Davis 2–1 in the semi-final group stages, before prevailing 9–6 against White 9–6 in the final, having trailed 3–5. His victory in the Professional Players Tournament saw him become the oldest winner of a ranking tournament, at 50 years and 14 days. Reardon also regained the Welsh Professional Title, eliminating Griffiths 9–4 and Mountjoy 9–1 in the semi-final and final respectively. At the 1983 World Snooker Championship, he lost 12–13 in the second round to Tony Knowles, and at the 1984 Championship he reached the quarter-finals, where he was eliminated 2–13 by Kirk Stevens.