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BNN Stats: Single-Season Records Monday, December 21st , 2015 Who holds the single season record in the Professional Baseball Circuit for ERA? Won-keun Baek, ELP, 1.489, 2013 Matt McFadyen, SF, 1.489, 2005 Tim Keller, LV, 1.530, 2014 Ron Clous, SF, 1.533, 2007 Mark Brown, WSH, 1.653, 2014 |
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