Average and over
Encyclopedia
Average and over, often abbreviated A&O, refers to two baseball statistics used in the 1850s and 1860s by the National Association of Base Ball Players
National Association of Base Ball Players
The National Association of Base Ball Players was the first organization governing American baseball. The first, 1857 convention of sixteen New York City clubs...

. They referred to a player's average performance over a number of games, and were among the first baseball statistics ever reported and tracked. The term and the reporting method were borrowed from cricket
Cricket
Cricket is a bat-and-ball game played between two teams of 11 players on an oval-shaped field, at the centre of which is a rectangular 22-yard long pitch. One team bats, trying to score as many runs as possible while the other team bowls and fields, trying to dismiss the batsmen and thus limit the...

.

The basic statistic was presented as a whole number (the "average") and a remainder (the "over").

Average and over (runs) was the average number of runs
Run (baseball)
In baseball, a run is scored when a player advances around first, second and third base and returns safely to home plate, touching the bases in that order, before three outs are recorded and all obligations to reach base safely on batted balls are met or assured...

 a player scored per game, expressed as a whole number and a remainder. If a player scored 29 runs in nine games, his average runs per game would be three, with two left over. This would be written as 3,2.

Average and over (hands lost) was the number of times a player was called out
Out (baseball)
In baseball, an out occurs when the defensive, or fielding, team effects any of a number of different events, and the umpire rules a batter or baserunner out. When a player is called out, he is said to be retired...

, divided by the number of games he played, once again expressed as a whole number and a remainder. If a player was called out 17 times in eight games, his average and over for hands lost
Hands Lost
Hands lost was the second statistic to be commonly recorded in baseball. The term refers to the number of times a player is called out. By the late 1850s, this statistic was almost always seen with runs in the NABBP.-References:...

 would be 2,1.

When statistics for hit
Hit (baseball)
In baseball statistics, a hit , also called a base hit, is credited to a batter when the batter safely reaches first base after hitting the ball into fair territory, without the benefit of an error or a fielder's choice....

s and total bases
Total bases
In baseball statistics, total bases refers to the number of bases a player has gained with hits, i.e., the sum of his hits weighted by 1 for a single, 2 for a double, 3 for a triple and 4 for a home run.Only bases attained from hits count toward this total....

were introduced in 1868, their totals were expressed in the same way.

In 1870, most teams began presenting these statistics in decimal form. Continuing the examples above, the player with 29 runs in nine games would have this reported as an average of 3.22 Runs per game. The man called out 17 times in eight games would have an average Hands Lost of 2.12.
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