He was only appointed in November.

But already Huddersfield Town head coach David Wagner is the ninth longest-serving manager in the Championship.

That 15 of the clubs who will play in the second tier this season have changed bosses since Wagner succeeded Chris Powell, some of them more than once, is a reflection of the cut-throat nature of modern-day football management.

It also shows the desire to reach the mega-rich Premier League, and stay out of League I.

Experienced Mick McCarthy is the longest-serving Championship chief. The former Millwall, Republic of Ireland, Sunderland and Wolves manager, 57, has been at the Portman Road helm since November 2012.

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Another Yorkshireman, ex-Town, Leeds United and Blackpool gaffer Simon Grayson, is the second longest in post, having been appointed by Preston North End in February 2013.

The 46-year-old has led each of his four clubs to promotion to the second tier.

Five clubs, Rotherham United, Aston Villa, Blackburn Rovers, Leeds United and Reading, have made appointments this month and Nottingham Forest have yet to confirm their new manager.

READ MORE: 'Buzzing!': Delighted Huddersfield Town fans react to David Wagner's new contract

READ MORE: New deals for Huddersfield Town manager David Wagner and assistant Christoph Buhler

FULL LIST

Ipswich Town: Mick McCarthy Nov 1 2012

Preston North End: Simon Grayson Feb 18 2013

Wolves: Kenny Jackett May 31 2013

Birmingham City: Gary Rowett Oct 27 2014

Brighton and Hove Albion: Chris Hughton Dec 31 2014

Norwich City: Alex Neil Jan 9 2015

Wigan Athletic: Gary Caldwell April 7 2015

Sheffield Wednesday: Carlos Carvalhal June 30 2015

Huddersfield Town: David Wagner Nov 5 2015

Brentford: Dean Smith Nov 30 2015

QPR: Jimmy Floyd Hasselbaink Dec 4 2015

Burton Albion: Nigel Clough Dec 7 2015

Fulham: Slavisa Jokanovic Dec 27 2015

Barnsley: Paul Heckingbottom Feb 6 2016

Bristol City: Lee Johnson Feb 6 2016

Newcastle United: Rafa Benitez March 11 2016

Cardiff City: Paul Trollope May 18 2016

Derby County: Nigel Pearson May 27 2016

Rotherham United: Alan Stubbs June 1 2016

Aston Villa: Roberto di Matteo June 2 2016

Blackburn Rovers: Owen Coyle June 2 2016

Leeds United: Garry Monk June 2 2016

Reading: Jaap Stam June 14 2016

Nottingham Forest: yet to appoint.