He will join the squad tonight and will play under the leadership of Yuvraj Singh.
"We were waiting for Ashish Nehra's fitness report and ultimately the report came yesterday. I was already in talks with Ganguly and we decided that the amount of experience that Sourav has in cricket will no doubt help the team. So we finalised Ganguly last night," Pune Warriors Team Director Abhijit Sarkar said referring to the finger injury that Nehra has been nursing.
The 38-year-old had earlier refused a mentor's role with KKR and there had been speculation of a possible comeback through another franchise.
The left-handed batman was first sought by Kochi Tuskers Kerala but their application was rejected by the IPL's Governing Council.
However, he signed on the dotted line for Pune yesterday, giving a major fillip to the side which has lost six matches on the trot after starting promisingly with a couple of back-to-back wins.
