Firhill has been used by other football teams and for rugby over the years. Between 1986 and 1991 Clyde ground shared with Thistle, following their eviction from Shawfield. Hamilton Academical also ground shared for two spells over seven years, following them being forced out of Douglas Park in 1994. In December 2005, Firhill also became the home of Glasgow's professional rugby union team, Glasgow Warriors, when they moved from their previous base at Hughenden Stadium. After returning to Hughenden in 2006, the Warriors took up a two-year residency at Firhill from the start of the 2007–08 Celtic League season. This was extended in April 2009 for a further five years. Glasgow Warriors left Firhill after the 2011–12 season and moved to Scotstoun Stadium. During the 2012–13 season the ground was also used by Celtic's under-20 squad as their home ground, but following Thistle's promotion this stopped for the 2013–14 season.