Career
He has previously played for Sheffield Wednesday, N ottinghamshire County, York City, Gainsborough Trinity, Matlock Town and North Ferriby United. Sheffield Wednesday
Born in Doncaster, South Yorkshire, McMahon started his career with Sheffield Wednesday. Signed as a trainee, he made his first senior start playing the full ninety minutes in a South Yorkshire Derby against Second Division rivals Barnsley on 13 March 2004 at Hillsborough in front of 25,664 supporters.
The results was a 2–1 victory with Guylain Ndumbu-Nsungu grabbing both goals either side of half time.
He continued to make eight more starting appearances that season and also make two as a substitute. However, McMahon was released by Wednesday at the end of the 2004-2005 season.
N ottinghamshire County
McMahon was signed by N ottinghamshire County on a one-year deal in July 2005 following his release by Sheffield Wednesday. McMahon left County at the end of the 2005-2006 season.
York City
McMahon was signed by York City on 18 August 2006 after he left N ottinghamshire County.
He was released by York at the end of the 2006-2007 season on 16 May 2007. Following his release, McMahon said: "We did have a good team but, towards the back half of the season, if anyone went to see me playing for the reserves they will have seen me stand out. I was scoring quite a few goals and doing really well.
I also lost a stone in weight and did everything the gaffer asked of me so I was a bit gutted not to get a chance to do it in the first team"
Gainsborough Trinity
McMahon joined Conference North side Gainsborough Trinity on 23 July 2007.
On 25 February 2012 McMahon joined Northern Premier League Premier Division club Matlock Town on a one-month loan. He returned to Trinity and was an unused substitute in the club"s play-off matches, which saw them lose in the final to Nuneaton Town.
He was released by Trinity in May 2012. Matlock Town
McMahon signed for Matlock permanently on 27 June 2012, and was their top scorer in 2012-2013 with 24 goals.
He returned to Gainsborough on a one-month loan on 22 November 2013, and scored five goals from five matches.
Later career
McMahon joined Conference North club North Ferriby United on 7 February 2014. McMahon moved to Australia and signed for Australian Football West Premier League club Floreat Athena later in 2014. McMahon was called up to the England C team for their game against Malta in February 2009.
