Returned to the club during the summer of 2013.
Orogianally signed for the Magpies at the beginning of Garry Flitcroft's reign in 2010, but moved on later that season.
He began his career in the youth academy at Bury in 1997, progressing to the reserve side. He made his first team début on 18 October 2005 in the first round of the Football League Trophy against Halifax Town, which Bury lost 6–1, as a 16th minute substitute, replacing striker Tom Youngs, after keeper Craig Dootson had been sent off.
He joined FC United of Manchester on a short-term loan in February 2008 as a stand in for the injured Sam Ashton. He was awarded with fans player of the month and also received the leagues goalkeeper of the month after a successful spell with the Red Rebels.
In August 2008, Grundy signed for Conference North side Burscoough but rarely featured for the club and was subsequently released and signed for Conference National side Cambridge United on non-contract terms.
After a successful trial period, Grundy signed for Conference North side Fleetwood Town on 1 August 2009. He made his debut later that day in a pre-season friendly against his former club Bury.
Up to end of 2013/14
Former clubs: Bury, FC United of Manchester, Burscough, Cambridge United, Fleetwood Town, Chorley