[6] Selected again in 2009,[7] Waterhouse was sent-off after coming into a fight between Steve Price and Brett White during game III of the State of Origin series.

His dismissal capped off a horror year for NSW as they lost their fourth (of eight) straight Origin series.

On 29 June 2011 it was announced Waterhouse had signed to join English Super League club Warrington from 2012 on a three-year deal.

Waterhouse played in the 2012 Challenge Cup Final victory over the Leeds Rhinos at Wembley Stadium,[9][10][11][12] scoring a try in the first half.

He played in the 2012 Super League Grand Final defeat by the Leeds Rhinos at Old Trafford.