The striker was released by Blackburn over the summer and has been trianing with the Latics to keep his sharpness.
Diouf is a good friend of Wigan goalkeeper Ali Al-Habsi following the pairs time with Bolton Wanderers.
The 30 year old striker presently has offers on the table from Doncaster and Blackpool.
Many Wigan supporters will never forgive Diouf for spitting in the face of Arjan De Zeeuw in a disgusting incident a number of years back.
