He is currently the goalkeeping coach at Scottish Championship side Dundee United, appointed in July 2023.
Between 1986 and 1996, Mathers made 132 appearances for Dundee, before moving to Falkirk, where he played 91 times in three years.
In his second stint at Dundee, which lasted for only one season, Mathers did not make a league appearance and was loaned out twice.
He did not make a first team appearance for St Mirren as he was employed primarily as a goalkeeping coach, but he continued to hold a playing registration.
Mathers was an unused substitute for a 2-2 SPL draw at Inverness Caledonian Thistle on 29 March 2014, aged 44.