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August 15, 2017

Betances, 29, is now in his fourth year as one of the AL's most dominant relievers, and while he has spotted at closer in each of the past three seasons he has become best known for his work as a setup reliever. Since the start of 2014, his 40.3% strikeout rate trails that of only teammate Aroldis Chapman and former teammate Andrew Miller, and only three relievers have lower ERAs than his 1.98 mark in that span.

Total players: 6

Honorable mention: None (though Doug Fister is at least a name most fans will recognize)

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