Career
Winterstein previously played for Wakefield Trinity and Canterbury Bulldogs in the NRL. Winterstein has signed a 2-year deal at Super League new comers Widnes. On 29 October 2013 it was announced that Samoan World Cup squad member Winterstein has signed a 1-year deal at Super League giants Bradford. Winterstein signed a 1 Year Deal with the whilst he was playing in the 2013 Rugby League World Cup with Samoa.
However he left to return home to Australia at the start of the season.
Winterstein has represented Samoa internationally, first playing in the Federation Shield in 2005.