After struggling to adapt and break into a Derby side pushing for promotion, plus the arrival of several midfielders in the January transfer window, Smith was sold.

Smith impressed during his time on loan at Millwall and manager Willie Donachie expressed an interest in retaining the youngster's services.

[9] He made his Crystal Palace first team debut on 27 August in the 2–0 League Cup defeat to Manchester City coming on as a substitute in the second half.

[10] On 27 January 2010, Smith joined Grimsby Town on trial, playing for The Mariners in a behind the closed doors friendly against Hull City at Blundell Park.

[11] On 2 February 2010, it was reported that Smith would join Kansas City Wizards on trial during their preseason training camp in Arizona,[12] and on 2 March he signed a two-year deal with the club.

On 21 November 2011, Sporting Kansas City traded Smith's rights to Chivas USA in exchange for two 2012 MLS Supplemental Draft picks.