Two years later he won back-to-back events, Illawarra Open and Gold Coast Classic.

Shortly thereafter, citing poor discipline, his game declined; Ferguson failed to make the PGA Tour and he would not win another official regular event.

[1] One of the earliest highlights of his professional career was at the October 1973 North Coast Open pro-am.

[3] In November 1974, he was in joint third place after the first round of the City of Auckland Classic, only behind Stewart Ginn and Tom Kite, tied with, among others, Hubert Green.

In early April he played in the Western Australia PGA Championship held at Sun City Country Club.

During the final day, he "appeared to lay the foundation for a win" after the opening two holes; he was the only player among the leaders not to drop a shot.

He shot a 67 (−5) on Saturday to put him in contention, two out of the lead jointly held by Chris Tickner, Vaughan Somers, and Barry Burgess.

On Sunday, Ferguson birdied Mount Lawley's 2nd and 3rd holes to quickly tie the lead.

During the final round of the Queensland Open, Ferguson led "a charge" against leader Hal Underwood with eagles on the 9th and 11th.

During the second round, he played erratically, hitting three tee shots into the woods and bogeying the par-5 ninth hole.

However, good recovery shots and an excellent short game helped him shoot a 67 (−5) to take the lead at 138 (−6).

In April, he finished joint runner-up at the Western Australian Open, three behind champion David Galloway.

In September he won the Papua New Guinea Open, defeating Englishman Guy Wolstenholme by six shots.

At the Illawarra Open he briefly took the first round lead on the front nine but double-bogeyed the 11th and bogeyed the next two holes.

Aided by Stewart Ginn's triple bogey on the 15th hole of the third round, Ferguson took a three stroke lead entering Sunday.

However, Ferguson "frittered away" this lead over the course of the back nine and was tied with Ginn at the end of regulation.

[33] During the European summer he also won the Rolex Open, an unofficial event in Geneva, Switzerland.

At the New South Wales Open in September, Ferguson shot 141 (−1) for the first two days to put him within four of Bob Charles' lead.

[45] Early in the third round, he made bogeys at the fourth and sixth to briefly lose the lead.

He would continue to play well on the back nine, shooting a 34 (−2), for a two shot lead over Brian Jones and John Kelly.

However, his lead challenger Brian Jones sliced his 72nd hole tee shot in the water and made bogey.

Among the players that made the cut, including champion Bill Rogers and runner-up Greg Norman, none scored better than Ferguson on the weekend.

Later in life Ferguson cited a "lack of maturity" and poor practice habits as reasons why he did not advance.

[58] He also won an unofficial team event in Japan in 1985, the Acom Doubles with partner Brian Jones.

[60] The following month, in January 1988, he recorded consecutive top tens at Sanctuary Cove Classic and Daikyo Palm Meadows Cup.

[61][62] In February he recorded a T-5 at the ESP Open at Royal Canberra Golf Club, shooting a 67 (−5) in the final round.

In January, he played excellently at the Sanctuary Cove Classic held in his home state of Queensland.

On Sunday, with the struggles of the leaders Frank Nobilo and Rodger Davis, Ferguson took the solo lead by the 14th hole.

[71] Ferguson received some media attention in 1999 when his brother-in-law Payne Stewart died in a plane crash.

The previous year he had already earned with European Senior Tour's card at Qualifying School, finishing in 11th place.