However, manager Craig Brown says Langfield, who signed a new one-year contract in May, could feature for the club's under-19 side on Monday.
While the £925m spent in the last nine winters is dwarfed by the £3.685bn outlay across the past 10 summers, there is a feeling this January could feature unprecedented levels of activity.
Kello became a free agent after leaving Wolves in March and could feature in St Mirren's visit to Dundee United, subject to international clearance.
Spectators hoping to witness prized events such as the 100m sprint final at Hampden on Monday 28 July, which could feature Jamaica's Usain Bolt, will pay between £30 and £90.
But Hodgson is keen for his young players to experience tournament football and, providing the Young Lions see off Croatia over two legs between 8 October and 14 October, all four could feature in the Czech Republic next summer.
The duo, who are David Holdsworth's first signings, have joined until 1 January and both could feature in Saturday's match at home to Barrow.
QPR are not scheduled to play their 12th Premier League game of the season until 17 November, although they could feature in three Capital One Cup ties in that time, which would also count towards the ban.
3 February: Mancini admits Tevez could feature in the Premier League again if he proves his fitness, and names the Argentinian in his 25-man squad for the remainder of the season.
Houston signed the former Pro Bowl wide receiver Eric Moulds this month, so the Texans' offense could feature Carr, Bush, Moulds and Andre Johnson, who has caught at least 63 passes in each of his three seasons.
Hartley, 28, has been out of action since March but has returned to contact training and could feature for his club in the Premiership final against Saracens next weekend.
