Rosenior spent three seasons as a regular in the Premier League before joining the Royals in 2007 and was a member of Stuart Pearce's Under-21 side who lost on penalties in the semi-final of that summer's European Championships.
He told the East Anglian Daily Times: "I didn't really research my move to Reading to be honest.
"I joined them expecting to play every week in the Premier League but it took me eight months to get in the team and then when I did they were obviously relegated.
"I feel I've got a point to prove because the last few years haven't quite worked out for me.
"I played for three years in the Premier League and to be honest I moved expecting to push my career on. People were talking about me breaking into the national squad and that obviously didn't happen."