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A -
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F -
G -
H -
I -
J -
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O -
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Q -
R -
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U -
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| Sport Category: O |
| OBA |
| On-base Percentage Allowed |
| OBP |
| On-Base Percentage: Divide the total number of hits plus Bases on Balls plus hits by Pitch BY at Bats plus Bases on Balls plus hit by Pitch plus Sacrifice Flies |
| OBSTRUCTION |
| The act of a fielder who, while not in possession of the ball and not in the act of fielding the ball, impedes the progress of any runner. If a fielder is about to receive a thrown ball and if the ball is in flight directly toward and near enough to the fielder so he must occupy his position to receive the ball he may be considered "in the act of fielding a ball." It is entirely up to the judgment of the umpire as to whether a fielder is in the act of fielding a ball. After a fielder has made an attempt to field a ball and missed, he can no longer be in the "act of fielding" the ball. |
| OFFENSE |
| The team, or any player of the team, at bat. |
| ON DECK |
| A term used to refer to the next batter up in the inning. This person stands in a designated circular area and warms up before batting. |
| OPS |
| On-base Plus Slugging Percentage |
| OUT IN ORDER |
| Retiring the first 3 batters in an inning. |
| OUTFIELD |
| Area between the back edge of the infield and home run fence. |
| OUTFIELDER |
| A fielder who occupies a position in the outfield, which is the area of the playing field most distant from home base. |
| OVERSLIDE |
| The act of an offensive player when his slide to a base, other than when advancing from home to first base, is with such momentum that he loses contact with the base. |
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