De Jong, who came to Tyneside after his brother Luuk was a major flop last season, suffered a serious thigh injury just three weeks after joining the Magpies from Ajax for £6m.
Luuk - biggest flop in years?
The first report claimed that he would not be fit to return until after Christmas, but he told the media he was well on course to recovery.
Sadly he seems to have another setback, and according to the Chronicle, the initial prognosis was right.
Siem - still waiting to put on his boots
No-one can blame the 25-year-old Dutch international for pushing for an early return, but it isn't going to happen.
De Jong put on Facebook yesterday: "On my way back to Newcastle. Just saw the surgeon in London and all looks good.
"I can slowly start building up strength again and start walking without crutches.
"Still a couple of months to go but I'm going to work hard and I'm sure I will get back stronger!"
WEEKEND FIXTURES
Saturday October 25
12:45 West Ham United v Manchester City
15:00 Liverpool v Hull City
15:00 Southampton v Stoke City
15:00 Sunderland v Arsenal
15:00 W Brom v Crystal Palace
17:30 Swansea City v Leicester City
Sunday October 26
13:30 Burnley v Everton
13:30 Tottenham v Newcastle United
16:00 Man Utd v Chelsea
Monday October 27
20:00 QPR v Aston Villa
-----------------------------------------------------------------------------------
Newcastle Utd Fixtures ...
2014/15 SEASON
Sunday August 17
NEWCASTLE 0 MAN CITY 2
Krul, Janmaat, Williamson, Coloccini, Dummett, Colback, Anita (63' Obertan), Cabella, Sissoko, Gouffran (74' Aarons), Riviere (83' Perez).
Subs: Haidara, Elliot, S Taylor, Abeid
Saturday August 23
ASTON VILLA 0 NEWCASTLE 0
Krul, Janmaat, Williamson, Coloccini, Dummett, Anita (70' de Jong), Colback, Cabella, Sissoko, Gouffran, Riviere (77' Perez - 90+2' S Taylor).
Subs: Haidara, Elliot, Obertan, Abeid
Tuesday August 26
LC GILLINGHAM 0 NEWCASTLE 1 (Egan OG)
Krul, Janmaat, Coloccini, S Taylor, Haidara, Sissoko, Abeid, Obertan, de Jong (68' Perez), Aarons (60' Cabella), Riviere (86' Gouffran)
Subs: Anita, Ferreyra, Elliot, Dummett
Saturday August 30
NEWCASTLE 3 CRYSTAL PALACE 3 (Janmaat, Aarons, Williamson)
Krul, Janmaat (79' Perez), Williamson, Coloccini, Haidara, Sissoko, Colback, Cabella, de Jong (79' Anita), Gouffran (67' Aarons), Riviere
Subs: Elliot, Obertan, S Taylor, Dummett
Saturday September 13
SOUTHAMPTON 4 NEWCASTLE 0
Krul, Janmaat, Williamson, Coloccini, Haidara, Anita (45' Tiote), Colback, Cabella (69' Perez), Sissoko (90'Ameobi), Gouffran, Riviere
Subs: Elliot, Obertan, S Taylor, Armstrong
Saturday September 20
NEWCASTLE 2 HULL CITY (Cisse 2)
Krul, Janmaat, Williamson, Coloccini, Dummett, Tiote (85' Ameobi), Colback, Sissoko, Cabella, Gouffran (90+4' Perez), Riviere (69' Cisse)
Subs: Anita, Haidara, Elliot, S Taylor
Wednesday September 24
LC CRYSTAL PALACE 2 NEWCASTLE 3 AET (Riviere 2, Dummett)
Elliot, Janmaat (46 Haidara), Coloccini, S Taylor, Dummett, Colback, Abeid, Obertan, Armstrong, Ameobi (66 Sissoko), Riviere (80 Perez)
Subs: Anita, Ferreyra, Cabella, Alnwick
Monday September 29
STOKE CITY 1 NEWCASTLE 0
Krul, Janmaat, Williamson, Coloccini, Dummett, Tiote, Colback, Sissoko, Cabella (74' Ameobi), Gouffran (68' Obertan), Riviere (45' Cisse)
Subs: Anita, Elliot, S Taylor, Armstrong
Saturday October 4
SWANSEA CITY 2 NEWCASTLE 2 (Cisse 2)
Krul, Janmaat, Williamson, Coloccini, Dummett, Obertan, Tiote, Sissoko, Colback (69' Riviere), Gouffran (58' Ameobi), Cisse (85' Perez).
Subs: Anita, Haidara, Cabella, Elliot
Saturday October 18
NEWCASTLE 1 LEICESTER CITY (Obertan)
Krul, Janmaat, S Taylor, Coloccini, Dummett (72' Haidara), Tiote, Anita (59' Perez), Colback, Obertan, Sissoko, Gouffran (90+2' Cabella), Cisse
Subs: Elliot, Abeid, Armstrong
Saturday October 25
Tottenham v Newcastle United
Saturday November 1
Newcastle United v Liverpool
Sunday November 9
West Brom v Newcastle United
Saturday November 22
Newcastle United v QPR
Saturday November 29
West Ham United v Newcastle United
Tuesday December 2
Burnley v Newcastle United
Saturday December 6
Newcastle United v Chelsea
Saturday December 13
Arsenal v Newcastle United
Sunday December 21
Newcastle United v Sunderland
Friday December 26
Man Utd v Newcastle United
Sunday December 28
Newcastle United v Everton
Thursday January 1 2015
Newcastle United v Burnley
Saturday January 10 2015
Chelsea v Newcastle United
Saturday January 17 2015
Newcastle United v Southampton
Saturday January 31 2015
Hull City v Newcastle United
Saturday February 7 2015
Newcastle United v Stoke City
Tuesday February 10 2015
Crystal Palace v Newcastle United
Saturday February 21 2015
Manchester City v Newcastle United
Saturday February 28 2015
Newcastle United v Aston Villa
Wednesday March 4 2015
Newcastle United v Man Utd
Saturday March 14 2015
Everton v Newcastle United
Saturday March 21 2015
Newcastle United v Arsenal
Saturday April 4 2015
Sunderland v Newcastle United
Saturday April 11 2015
Liverpool v Newcastle United
Saturday April 18 2015
Newcastle United v Tottenham
Saturday April 25 2015
Newcastle United v Swansea City
Saturday May 2 2015
Leicester City v Newcastle United
Saturday May 9 2015
Newcastle United v West Brom
Saturday May 16 2015
QPR v Newcastle United
Sunday May 24 2015
Newcastle United v West Ham United
LEAGUE CUP - Ties to be played on September 23-24.
Chelsea v Bolton
Arsenal v Southampton
West Brom v Hull
Crystal Palace v Newcastle
Leyton Orient v Sheff Utd
Cardiff v Bournemouth
Sunderland v Stoke
Derby v Reading
Liverpool v Middlesbrough
MK Dons v Bradford
Man City v Sheff Wed
Burton v Brighton
Swansea v Everton
Shrewsbury v Norwich
Fulham v Doncaster
Tottenham v Nottm Forest
SKY SPORTS GAMES
OCTOBER
Mon 20: West Bromwich Albion v Manchester United (8pm)
Sat 25: Swansea City v Leicester City (5.30pm)
Sun 26: Burnley v Everton (1.30pm)
Sun 26: Manchester United v Chelsea (4pm)
Mon 27: Queens Park Rangers v Aston Villa (8pm)
NOVEMBER
Sun 2: Manchester City v Manchester United (1.30pm)
Sun 2: Aston Villa v Tottenham Hotspur (4pm)
Mon 3: Crystal Palace v Sunderland (8pm)
Sat 8: Queens Park Rangers v Manchester City (5.30pm)
Sun 9: West Bromwich Albion v Newcastle United (1.30pm)
Sun 9: Swansea City v Arsenal (4pm)
Sat 22: Arsenal v Manchester United (5.30pm)
Sun 23: Crystal Palace v Liverpool (1.30pm)
Sun 23: Hull City v Tottenham Hotspur (4pm)
Mon 24: Aston Villa v Southampton (8pm)
Sat 29: Sunderland v Chelsea (5.30pm)
Sun 30: Southampton v Manchester City (1.30pm)
Sun 30: Tottenham Hotspur v Everton (4pm)
BT SPORT GAMES
OCTOBER
Sat 25: West Ham United v Manchester City (12.45pm)
NOVEMBER
Sat 1: Newcastle United v Liverpool (12.45pm)
Sat 8: Liverpool v Chelsea (12.45pm)
Sat 29: West Bromwich Albion v Arsenal (12.45pm)