The stadium is the largest by seating capacity in Canada. After the Olympics, artificial turf was installed and it became the home of Montreal's professional baseball and football teams. The Montreal Alouettes of the CFL returned to their previous home of Molson Stadium in 1998 for regular season games, but continued to use Olympic Stadium for playoff and Grey Cup games until 2014 when they returned to Molson Stadium for all of their games. Following the 2004 baseball season, the Expos relocated to Washington, D.C., to become the Washington Nationals. The stadium currently serves as a multipurpose facility for special events (e.g. concerts, trade shows) with a permanent seating capacity of 56,040. The capacity is expandable with temporary seating. Club de Foot Montréal (formerly known as Montreal Impact) of Major League Soccer (MLS) has used the venue when demand for tickets justifies the large capacity or when the weather restricts outdoor play at nearby Saputo Stadium in the spring months.