[1] After being signed by the former Brisbane Roar coach Frank Farina on a two-year contract, Zullo played five of the six opening games of the season, coming on as a substitute.

On his first eleven debut against Wellington Phoenix, his sixth appearance for Queensland, he scored in the opening minutes of the game and set up a first half added-time goal for fellow youngster and close friend Robbie Kruse.

[9] In his first season at the Sky Blues, he played an influential role as an attacking fullback, assisting three goals and forming a good partnership with left winger Miloš Ninković.

[10] Due to outstanding form since making his debut for Brisbane Roar, Zullo was called up for the first time for the Australia national under-23 football team before their qualifier against Iraq, in which they won 2–0.

On 28 January 2009, Zullo made his full international debut, coming on as a substitute in a 0–0 draw with Indonesia in the group stage of qualifying for the 2011 AFC Asian Cup.