Table:
text: 2012–13 Bolton Wanderers F.C. season
Transfers
Loan in
Date_from Date_to Pos_ Name_ From_
3 August 2012 31 January 2013 FW Benik Afobe Arsenal
31 August 2012 30 June 2013 MF Jay Spearing Liverpool
21 September 2012 22 December 2012 DF Stephen Warnock Aston Villa
8 November 2012 5 January 2013 MF Jacob Butterfield Norwich City
25 January 2013 27 April 2013 DF Craig Dawson West Brom
25 January 2013 January 2014 MF Ján Greguš Baník Ostrava
31 January 2013 3 March 2013 MF Steve De Ridder Southampton
28 March 2013 30 June 2013 FW Robert Hall West Ham
28 March 2013 4 May 2013 DF Danny Butterfield Southampton

Question: How many players were dfs in Bolton Wanderers FC season 2012/13?