The 43-year-old guided the club to promotion last season, ending an 11-year stint in League One, but failure to win any of the previous 12 games has seen him dismissed
Huddersfield Town have sacked manager Simon Grayson after just 11 months in charge.
The 43-year-old was relieved off his duties after the Championship outfit failed to register a win in their previous 12 outings, despite an early season run of form that saw them climb to sixth.
Grayson guided the team to promotion from League One via the play-offs last season, ending an 11-year stint in England’s third tier for the Terriers.
In a statement released on the club's official website, chairman Dean Hoyle said that fear of relegation prompted the dismissal: "We brought Simon in with the immediate aim to lead the club to promotion and he did that at the first attempt. It is an achievement for which we are grateful.
"We knew the transition to Championship football would be difficult and our targets for this season have been realistic, with retention of our status the priority.
"However, having worked so hard to get back into the second tier we have to do everything we can to consolidate that position. After exceeding all our expectations in the early part of the season, our results and performances as a team and from individual players have tailed off alarmingly.
"Worsening displays have accompanied a run of just six points and no wins from the last 12 league games, including some very heavy defeats, culminating at Watford last Saturday.
"We will not rush to make a new appointment. In the interim academy manager Mark Lillis and senior professional development coach Steve Eyre will take control of the team, starting with Saturday’s FA Cup fourth round game at home to Leicester City."