one of the best years in the history of Victorian amateur golf. During the year, Cahill joined the Victoria Junior Golf Association. He served as "junior captain." In late February, he played the two-round Victoria Junior Open Golf Championship. In the final round, he shot a 69, tying for the round of the tournament, to win by four strokes. In September 1971, he played the Victorian Amateur Championship again. It was held at his home course, Yarra Yarra Golf Club. Cahill reached the finals where he faced Ken Kilburn. Cahill defeated Kilburn 4 & 3. After the match Kilburn stated, "Cahill has the ability and the potential to do anything in golf. He has more potential than any other player I have seen in my career in amateur golf." In November, Cahill played the two-round Champion of Champions at Commonwealth Golf Club. In the middle of the second round Cahill "virtually clinched" the title with three consecutive birdies. With his one-under-par 71, he won by four strokes. Peg McMahon of the The Age stated, "Cahill's phenomenal run of success is a record for Victorian golf." It was the first time anyone in a singular year had won the Victorian Junior, Victorian Amateur, and Champion of Champions. In 1972, Cahill retained captainship of Victoria's junior golf team. Early in the year, Cahill was invited to play Victorian Open, his first professional tournament. In February, Cahill played the Victorian Junior Golf Championship in defense of his championship. He finished in fourth place, two back. In June, he played the Victorian Senior Amateur again. It was held at Kingston Heath Golf Club. In the semifinals, he played Bill Britten. Cahill won on the 36th hole, 1 up. In the finals he was scheduled to play Ray Jenner. Cahill won easily, 8 & 7. "I never really had a chance," Jenner said after the match. "He's in another class." After the event, Peter Stone of The Age wrote, "Potentially, Cahill could become one of Australia's great golfers." In late June, he was selected to represent Australia at the 1972 Eisenhower Trophy. The team finished in second place to the United States. During this era, he briefly served as a caddie for top American golfers Tom Weiskopf and Sam Snead. In June 1973, Cahill played the Victorian Amateur Championship once again. He reached the finals where he faced Ray Jenner again. Cahill defeated Jenner 3