The 1972–73 Ottawa Nationals season was the Nationals' only season, as they were one of the original teams in the newly created WHA. The Nationals played most of the season in Ottawa, but transferred their playoff games to Toronto. Due to low attendance in Ottawa, an arena lease dispute, and much better attendance in their two playoff games in Toronto, where they averaged over 5000 fans per game, the Nationals relocated to Toronto permanently beginning in the next season. The club was renamed the Toronto Toros.