 Manchester United signed Possebon in January 2008, and since his father is of Italian descent, Possebon qualified for an Italian passport, and so was not subject to European Union legislation regarding non-Europeans working in Europe.Possebon was allocated the number 34 shirt, which was vacated by Ryan Shawcross, for the remainder of the 2007–08 Premier League season.He made his professional debut for the club as a substitute, coming on for Ryan Giggs during the second half of the 1–1 draw with Newcastle United on 17 August.