1980 NSWRFL Midweek Cup| NSWRFL Tooth Cup | 
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| Dates | 2 April - 20 August 1980 | 
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| Teams | 16 | 
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| Venue(s) | 3 (in 3 host cities) | 
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| Champions | Parramatta (1st title) | 
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| Runners-up | Balmain | 
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| Matches played | 23 | 
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 The 1980 Tooth Cup was the 7th edition of the NSWRFL Midweek Cup, a NSWRFL-organised national club Rugby League tournament between the leading clubs and representative teams from the NSWRFL, the BRL, the CRL, the QRL and the NZRL. 
A total of 16 teams from across Australia and New Zealand played 23 matches in a round-robin format with teams playing 2 games each with the top 8 teams advanced to a knockout stage, with the matches being held midweek during the premiership season. 
  Qualified Teams
    | Team  |  Nickname  |  League  |  Qualification  |  Participation (bold indicates winners)  | 
  | St. George  |  Dragons  |  NSWRFL  |  Winners of the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Canterbury-Bankstown  |  Bulldogs  |  NSWRFL  |  Runners-Up in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Parramatta  |  Eels  |  NSWRFL  |  Third Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Cronulla-Sutherland  |  Sharks  |  NSWRFL  |  Fourth Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Western Suburbs  |  Magpies  |  NSWRFL  |  Fifth Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Balmain  |  Tigers  |  NSWRFL  |  Sixth Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Manly-Warringah  |  Sea Eagles  |  NSWRFL  |  Seventh Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Eastern Suburbs  |  Roosters  |  NSWRFL  |  Eighth Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | South Sydney  |  Rabbitohs  |  NSWRFL  |  Ninth Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Penrith  |  Panthers  |  NSWRFL  |  Tenth Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Newtown  |  Jets  |  NSWRFL  |  Eleventh Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | North Sydney  |  Bears  |  NSWRFL  |  Twelfth Place in the 1979 New South Wales Rugby Football League Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
  | Brisbane  |  Poinsettias  |  BRL  |  League Representative Team  |  2nd (Previous: 1979)  | 
  | NSW Country  |  Kangaroos  |  CRL  |  Country League Representative Team  |  2nd (Previous: 1979)  | 
  | Queensland Country  |  Maroons  |  QRL  |  Country League Representative Team  |  2nd (Previous: 1979)  | 
  | Auckland  |  Falcons  |  NZRL  |  Winners of the 1979 New Zealand Rugby League Inter-District Premiership  |  7th (Previous: 1974, 1975, 1976, 1977, 1978, 1979)  | 
 
 Venues
  Round 1
  Round 2
   Quarter finals
  Semi finals
  Final
  Player of the Series
  Golden Try
  Sources
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| Amco Cup |  | 
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| Tooth Cup |  | 
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| KB Cup |  | 
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| National Panasonic Cup |  | 
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| Panasonic Cup |  | 
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