An Australian international and Queensland State of Origin representative wing, he played in the Brisbane Broncos' first five Grand Final victories in 1992, 1993, 1997 Super League, 1998 and 2000.

He was known for his strength, elusiveness and a wide-legged running style that allowed him to change direction sharply and sometimes several times as he approached opposition defences.

At the end of the year Hancock was a member of the Broncos team that defeated the St George Dragons 28–8 in the 1992 Winfield Cup Grand Final.

He then traveled to England where he played on the wing in Australia's 10–6 win over Great Britain in the 1992 World Cup final in front of 73,631 fans at Wembley Stadium, London.

A week after the Final, Hancock scored two tries in Brisbane's 22–8 victory over English champions Wigan in the 1992 World Club Challenge at Central Park.

Called into the team after injury ruled out Broncos teammate Willie Carne, Hancock didn't score in the game but made a number of breaks and almost always had the hapless French grasping at air trying to tackle him.

The advent of the unlimited interchange rule prolonged Hancock's career, with coach Wayne Bennett opting to use him as an impact player on the wing or in the Second-row.

At the time of his retirement, he held the record for most appearances for the Broncos until Darren Lockyer surpassed him in 2007, and was number two on the club's all-time top try-scorers list with 120 (second only to Steve Renouf's 142).