Delhi have also released Yuvraj Singh, Ross Taylor, Dinesh Kartik and Murali Vijay, as well as South African duo Wayne Parnell and Imran Tahir.
Pietersen is currently in Australia playing for the Melbourne Stars in the Big Bash. His county future is uncertain, too, after his registration was cancelled by Surrey last year.
Released players by IPL team:
Amit Mishra, Aaron Finch, Darren Sammy, Irfan Pathan, Jason Holder, Y Venugopal Rao, Bernard Taylor, Prashant Parmeshwaran, Aniruddh Srikkanth, Manprit Juneja
Zaheer Khan, Pragyan Ojha, Jalaj Saxena, CM Gautham, Sushant Marathe, Apurv Wankhede, Krishmar Santokie, Ben Dunk
Chennai Super Kings
Ben Hilfenhaus, John Hastings, Vijay Shankar, David Hussey
Kevin Pietersen, Murali Vijay, Dinesh Karthik, Laxmi Ratan Shukla, Ross Taylor, Jaydev Unadkat, Rahul Sharma, Jimmy Neesham, Siddharth Kaul, Wayne Parnell, Rahul Shukla, HS Sharath, Milind Kumar, Imran Tahir
Kings XI Punjab
Cheteshwar Pujara, L Balaji, Murali Kartik (retired)
Kolkata Knight Riders
Jacques Kallis (retired), R Vinay Kumar, Manvinder Bisla, Debabrata Das, Sayan Sekhar Mondal
Rajasthan RoyalsRoyal Challengers Bangalore
Brad Hodge, Unmukt Chand, Iqbal Abdulla, Kevon Cooper, Ankit Sharma, Amit Sharma, Ankush Bains
Yuvraj Singh, Albie Morkel
, Parthiv Patel, Muttiah Muralitharan, Ravi Rampaul, Sachin Rana, Shadab Jakati, Tanmay Mishra