A polo handicap is a system created by Henry Lloyd Herbert, the first president of the United States Polo Association, at the founding of the USPA in 1890 so teams could be more evenly matched when using players with varying abilities.
The players are rated on a scale from minus-2 to 10. Minus-2 indicates a novice player, while a player rated at 10 goals has the highest handicap possible. It is so difficult to attain a 10-goal handicap that there are fewer than two dozen in the world, and about two-thirds of all players handicapped are rated at two goals or less. Currently, all living ten-goal players are Argentine.
Handicaps of five goals and above generally belong to professional players. It is not (nor has it ever been) an estimate of the number of goals a player might score in a game, but rather of the player's worth to his or her team. It is the overall rating of a player's horsemanship, team play, knowledge of the game, strategy, and horses. At one time, polo was the only sport in the world that considered sportsmanship when rating a player.
In matches played by "handicapped" players (as opposed to open competition, where handicaps are not considered), the handicaps of all four players are totaled. If the total handicap of a team is more than that of the team against which they are playing, the difference is added to the scoreboard. For example, if the Mounties polo team has a total handicap of six goals and the Tayto team has a handicap of four goals, Tayto would begin the match with a two-goal advantage.
A player's handicap is usually assessed by a committee at the authorizing club of his country. A professional player may be assigned an equivalent rating in countries where he competes. Though standards are similar, the ratings may be expressed differently. e.g.:
Argentina: 0 to 10
USA: C (-2), B (-1), B+ (-0.5), A (0), A+ (0.5), 1.0, 1.5, 2 to 10
England: -2 to 10.
Ten-goal players, highest handicap achieved in outdoor poloEdit
- Rodolphe Louis Agassiz (1871–1933) – USA
- Mariano Aguerre (born 1969) – Argentina / USA 
- Mike Azzaro – USA
- Miguel Novillo Astrada – Argentina
- Gerald Barnard Balding Sr. (1903–1957) - England's last 10 goal player.
- Adolfo Cambiaso (born 1975) – Argentina
- Bartolomé Castagnola (born 1970) – Argentina 
- Carlos Gracida (1960–2014) – Mexico
- Alfredo Harriott – Argentina (born 1945)
- Juan C. Harriott Jr. - Argentina 
- Alberto Pedro Heguy – Argentina (born 1941)
- Bautista Heguy – Argentina / England
- Ignacio Heguy – Argentina
- Marcos Heguy – Argentina
- Foxhall Keene (1867–1941) - USA
- Lewis Lawrence Lacey (1887–1966) – Argentina.
- Pablo Mac Donough (born 1982) – Argentina / Spain / USA
- Agustin Merlos – Argentina / Spain / USA
- Lucas Monteverde (born 1976) – Argentina
- Juan Martin Nero – Argentina / Spain
- Facundo Pieres (born 1986) – Argentina / USA
- Gonzalo Pieres Jr. (born 1982) – Argentina / France
- Pablo (Polito) Pieres (born 1987) – Argentina 
- Aidan Roark (1905–1984) – Ireland 
- John Sinclair-Hill (born 1934) - Australia
- Bob Skene (1914–1997) - Australia
- David Stirling (born 1981) – Uruguay 
- Louis Ezekiel Stoddard (1881–1951) – USA 
- John Arthur Edward Traill (1882–1958) – Argentina / Ireland 
- Hilario Ulloa (born 1985) – Argentina
- Tommy Wayman (born 1946) – USA
Nine-goal players, with a maximum 9-goal handicap achieved in outdoor poloEdit
- Eduardo Novillo Astrada – Argentina
- Ignacio Novillo Astrada – Argentina
- Javier Novillo Astrada – Argentina
- Major Sardar Joginder Singh Baidwan (1904–1940)
- Santiago Chavanne – Argentina
- Lucas Criado – Argentina
- Francisco DeNarvaez – Argentina
- Alejandro Diaz-Alberdi – Argentina
- Gabriel Donoso (1960–2006) – Chile
- Elbridge T. Gerry Sr. - United States
- Alberto Heguy – Argentina
- Eduardo Heguy – Argentina
- Matias MacDonough – Argentina
- Maharaj Sawai Mansingh – India
- Juan Alberto Merlos (1945) – Argentina
- Juan I. Merlos – Argentina
- Sebastian Merlos – Argentina
- Lucas Monteverde (born 1976) – Argentina
- Juan Martin Nero – Argentina
- Eric Leader Pedley - United States
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... Rodolphe Louis Agassiz reached the 10-goal summit.
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His name was Aidan Roark and he was a charming Englishman and a ten-goal player of polo. Aside from his skill with a mount and a polo mallet, Roark really didn't have a brain in his head. Zanuck installed him in an office at Fox and ...
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Louis Ezekiel Stoddard, 70, socialite polo star of three decades ago; of a heart ailment; in Los Angeles. He played on two international challenge teams (1913, 1921), became a ten-goal man in 1922.
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