When Jermain Defoe arrived at Sunderland he was expected to be the catalyst behind the club's revival.
The Black Cats had struggled for goals all season, but with the addition of Defoe there came a guarantee of goals.
Over the years Defoe had proven to be one of the Premier League's most dangerous marksmen and he had found hitting the back of the net easy, whoever he had represented.
However, the impact Defoe has had has been unexpectedly limited and it may be that the man brought in to save the club's season ended up being part of the reason that Gus Poyet lost his job.
Sunderland disposed with Poyet after a 4-0 defeat to Aston Villa and there were few complaints about the Uruguayan's departure.
The side seemingly had become lost under his leadership and they appeared to be going backwards as the season progressed.
Part of the reason for this decline may have been Poyet's desperation to get a faltering Defoe firing.
The Black Cats manager ended up experimenting with a number of formations soon after Defoe joined up, as he looked to get the England international the service he desperately craved.
Poyet tried deploying his Sunderland side in a 3-5-2 formation when Defoe first signed, before changing to 4-3-3 and 4-4-2 as he searched for the right formula.
In the end his tinkering ended up visibly confusing his side as their performances ended up becoming more and more disjointed.
It means that Defoe's transfer may have, ultimately, had dire consequences for Poyet and the 32-year-old will have to ensure that he starts finding the net under new boss Dick Advocaat otherwise his addition could have been a costly mistake by Sunderland.