The rule varies by state – for example, the clock does not stop upon a score in Colorado or Kansas (regular season games only) unless the score difference is reduced to below the rule-invoking amount.
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In ISF-sanctioned competitions, the run ahead rule (the ISF's terminology) is, for fast or modified fast pitch, 20 runs after three innings, 15 after four, or 7 after 5.
Mercy rule, in sports to allow a lopsided game to come to an early end
Sisters of Mercy | Korea under Japanese rule | Ja Rule | The Sisters of Mercy | away goals rule | Mercy Me | Mercy Hospital | Cloistered rule | Ten Minute Rule | Taiwan under Japanese rule | Mercy | No Mercy | Ann Rule | Star Wars: Darth Bane: Rule of Two | Mercy Hospital (disambiguation) | University of Detroit Mercy School of Law | University of Detroit Mercy | The Rule of Four | Rule Britannia | Rule 5 draft | No Mercy (pop band) | mob rule | Mercy (TV series) | Mercy Hospital for Women, Melbourne | Mercy Hospital for Women | Mercy Corps | Home Rule League | Golden Rule | Forced labour under German rule during World War II | District of Columbia home rule |
The Mercy Rule (1998), Nothing But the Truth (2000), and The Suspect (2007) have been major market Book Club selections.