Sonko was at the centre of controversy when refusing to play in a Reading reserve team game and was expected to be one of the first-team squad allowed to move on following the Royals relegation from the top flight.
The Potters have made no secret of the fact that they want to strengthen their defensive options and with Sunderland keen to keep Danny Higginbotham, it appears Pulis has now looked to Sonko.
The 27-year-old will become Stoke's second signing from Reading during this summer, following the capture of Dave Kitson for £5.5million.




