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 Changing the Rules Chronology of Changes to Major League Baseball Official Rules Table O: Rule Changes 1980-1989 |
| Table O: Rule Changes 1980-1989 | ||
| DATE | RULE CHANGE | Rule |
| 1983 | A pitcher who pitches only a third of an inning in a season will not have his ERA rounded off. His total for innings pitched will be carried as one third. | 10.22 |
| 1988 | Protective helmets are mandatory for catchers. | 1.16(d) |
| 1989 | The "game-winning RBI" (previously credited to a batter who gave his club "the lead it never relinquished") is eliminated as an official statistic. | 10.04(e) |
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