On 10 April 2010 he made his Championship debut, replacing Adel Taarabt as a last-minute substitute, in a 2–0 win over Crystal Palace at Selhurst Park.
[15] Parker then joined Wycombe Wanderers on 23 November 2010 on a three-month loan deal and made his debut on the same night against Torquay United, coming on as a second-half substitute.
His loan spell was cut short when he suffered a stress fracture in his left foot while on international duty with Antigua and Barbuda.
He returned to QPR but failed to make another appearance and was released at the end of the season following their promotion to the Premier League.
Parker signed a one-year contract at Oldham Athletic on 5 August 2011 following a successful trial period and made his competitive club debut on the first day of the 2011–12 season, as a substitute in the Football League match against Sheffield United.
After a year and a half in the Slovenian First League, he moved to Serbian SuperLiga side Red Star Belgrade.
[27] Josh Parker joined Charlton Athletic as a late deadline day transfer, on a six-month contract.
[39] In March 2016, he was a contestant on Channel 4's Couples Come Dine with Me (Season 3, Episode 33) which was filmed in Aberdeen during his time on loan.