Cafferkey was named in the 2012 All Star football team in the full back position.[1] He was nominated again the following year, though did not win.[1]
Cafferkey sustained a serious hamstring injury in 2016.[1]
Cafferkey announced his retirement from inter-county football via social media on Monday 9 September 2019, having made 104 appearances in league and championship for his county team.[1] Due to his preference for defence he never scored for Mayo in either the league or the championship.[1] His last appearance was against Dublin at Croke Park in the 2019 National Football League, having won the man of the match award in the previous game against Cavan but limping off the field at Croke Park in the first half with one of his customary hamstring injuries, and then having his championship season curtailed by injury. Cafferkey's announcement followed swiftly from a similar one by Andy Moran.[1]
Cafferkey did not seek the media spotlight. He only twice appeared before the media: in 2013 (the league defeat of Kerry) and 2019 (the previously mentioned league game against Cavan) to collect two man of the match awards.[1]
^"NUI Galway students and alumni head for Croke Park with Mayo senior football finalists". 17 September 2013. Archived from the original on 17 December 2016. The Mayo squad contains a large number of current and former students including Ger Cafferkey, Jason Doherty, Alan Dillon, Conor O'Shea, Shane McHale, Chris Barrett and Cathal Freeman. Former Inter-County star James Nallen, who is a selector with the Mayo side, is a Chief Technical Officer in NUI Galway's School of Physics.