Worsfold decided last month that his heart was not in going around again as coach of the Eagles after 12 years in charge which brought the 2006 AFL premiership, losing grand final of 2005 and finals appearances in 2002, 2003, 2004, 2007, 2011 and 2012.
That meant that the Eagles were in the hunt for a new coach for the first time in over a decade and after an extensive process, the decision came down to Simpson and dual premiership star Peter Sumich.
Sumich has done an extensive apprenticeship to be considered for a senior coaching position.
Following a playing career with the Eagles that included two premierships and two leading goalkicker awards, Sumich coached South Fremantle in the WAFL in 2000 and 2001, and then for 11 years was a successful assistant back at the Eagles including the 2006 premiership.
He has previously been considered closely for several senior coaching positions including at Essendon and Melbourne, and this appeared his best opportunity back at the club he is a favourite son at, but it appears Simpson has now pipped him at the post.
With Simpson said to be confirmed as the new senior coach of the West Coast Eagles on Friday morning, it could very well be the end of Sumich's dreams of getting the main job at an AFL club.
However, Sumich is expected to remain Ross Lyon's righthand man at Fremantle now and all the focus at the Eagles will fall on Simpson.
The now 37-year-old had a decorated playing career with North Melbourne where he played 306 games including the 1996 and 1999 premierships, and was captain for five years, a best and fairest winner and an All-Australian.
Since retiring at the end of the 2009 season, Simpson has quickly turned his hand to coaching and become a key member of the staff at Hawthorn including the team that made the 2012 grand final and won the 2013 premiership.
That has seen him impress all and sundry with the work he has done under Alastair Clarkson, and now he will jump into the challenge of trying to get the Eagles back on course.
West Coast was one of the premiership favourites coming into 2012, but failed to fire a shot just about all season missing out on finals and now is undergoing quite a turnover with the playing list.
Adam Selwood, Andrew Embley, Mark Nicoski, Brad Dick and Ashton Hams have already retired with Daniel Kerr expected to soon join them.
With Ashley Smith, Murray Newman, Cale Morton and Jacob Brennan all chances to be delisted as well, Simpson could have to oversee quite a turnover of players and trying to revive the playing list from 2014 onwards.