Lee Frecklington has added to Peterborough's problems ahead of the visit of the Rams.
Frecklington was sent off for two bookable offences during the first half of the 2-1 defeat at Championship leaders Southampton on Tuesday night and must serve a one-match ban. The midfielder joins forward Lee Tomlin on the suspension list. Tomlin will complete his three-game absence against the Rams.
With defenders Craig Alcock and Scott Wootton and teenage midfielder Joe Newell out injured, manager Darren Ferguson has just 16 players available. The shortage of senior players will see Ferguson include 15-year-old striker Jannai Gordon Hutton on the bench.
Josh Thompson, Daniel Kearns, David Ball and Emile Sinclair are pushing for recalls.
Derby's visit is the final game before the international break, and Ferguson admits the two-week sabbatical will come just at the right time for Posh.
He said: "The break will do us good as we need to get players back."
Russell Anderson has added to Derby's injury problems ahead of the trip to Peterborough.
Anderson limped off after 32 minutes of the 3-0 home defeat to Cardiff on Wednesday night with a damaged hamstring. Jake Buxton, another central defender, came on and filled in at right-back in a patched-up back four which saw Kevin Kilbane partner stand-in skipper Jason Shackell, who has been battling on with a hip problem, at centre-half in the absence of Mark O'Brien (shoulder).
Anderson had been helping out at right-back with last season's player-of-the-year John Brayford sidelined by a thigh injury. The Scot had started in the position in four of the last five matches.
With Anderson a major doubt and O'Brien receiving pain-killing injections and likely to remain out, Kilbane and the recently fit-again Buxton could be asked to play out of position once more at London Road.
Manager Nigel Clough is already without captain Shaun Barker (knee), fellow defenders Chris Riggott, O'Brien and Brayford, midfielders James Bailey and Paul Green and forwards Steven Davies (fractured skull), Nathan Tyson (groin) and Theo Robinson (hamstring).
With the two-week international break set to kick in after the game on Saturday, Clough may opt not to rush back any of his injured players. Schoolboy Mason Bennett could retain his place after making his full home debut in midweek but fellow teenager Callum Ball, Tomasz Cywka and Conor Doyle are also options.