[10] Worsfold played in his first finals match at the conclusion of the 1988 season, a two-point loss to Melbourne at Waverley Park.

Having been appointed vice-captain prior to the start of the 1989 season, he took on greater leadership roles under the influence of new coach Michael Malthouse.

[14] Moving from a midfield role to a half-back flank in 1991, Worsfold was officially made club captain and played a total of 21 games, including the loss in the 1991 Grand Final to Hawthorn.

[25] He had also been in contention for the position of senior coach at Richmond but declined to be interviewed after accepting the role at Carlton.

[27] Carlton's senior coach David Parkin suggested the appointment had come "out of the blue", and it was later reported that he had threatened to quit as a result of the club's lack of consultation.

[31] At the end of the 2000 season, with Carlton having lost to Essendon in a preliminary final, Parkin retired as senior coach, and was replaced by Brittain.

[34] He also stated in his interest in the position at St Kilda, which was eventually filled by Grant Thomas, who had been serving as caretaker senior coach.

[35] After Carlton's season ended with a semi-final loss to Richmond, Worsfold interviewed with both Fremantle and his old playing club, West Coast, who had sacked Ken Judge.

[12] In the 2006 season, the club finished on top of the ladder after the home and away series, and followed it up with a win in the 2006 AFL Grand Final, when West Coast Eagles defeated the Sydney Swans, this time the margin being a solitary point with the final score West Coast Eagles 12.13 (85) to Sydney Swans 12.12 (84).

[13] In doing so, Worsfold became only the fourth person in the history of the AFL/VFL to both captain and later coach the same club to an AFL premiership and the first at the West Coast Eagles.

In the 2009 season, Worsfold and the West Coast Eagles Football Club made an improvement, finishing eleventh on the ladder with eight wins and fourteen losses.

The 2010 season brought in another low point of Worsfold's coaching career with the Eagles completing a spectacular fall from grace and receiving the wooden spoon, winning just four games; two against Essendon and one each against Hawthorn and Melbourne.

Worsfold became the fourth man (of five) after Reg Hickey, Charlie Sutton, Tony Jewell and later Adam Simpson to coach the same club to both a premiership and a wooden spoon.

At the conclusion of round ten of the 2012 season, Worsfold passed Mick Malthouse's record for the most games coached at West Coast.

[49] Due to this, the club finished on the bottom of the ladder for the first time since 1933, and Worsfold claimed his second wooden spoon as a coach.

[50] In the 2018 season Worsfold took Essendon to finish eleventh on the ladder, missing out of the finals with ten wins and twelve losses.

[51][52] In the 2020 season, Essendon finished thirteenth on the ladder with six wins and ten losses, therefore missing out of the finals.

In an era where most coaches had implemented "the flood" defence by having their players zone back, Worsfold maintained a man-on-man style of game for his West Coast team during the mid-2000s.

The 2009 season had seen Worsfold and his coaching department implement the use of both zone defence and man-on-man strategy depending on the situation.

[54] After leaving Essendon, Worsfold spent four years as General Manager of People and Culture at the ASX-listed Emeco Group.

[59] Outside of football, he completed a Bachelor of Pharmacy at the Curtin University of Technology in 1989, and later worked as a pharmacist for an amount of time.