Aroldis Chapman
On June 22, 2017, Corey Knebel set the MLB record for most consecutive appearances with at least one strikeout by a relief pitcher at 38. The record was previously set in 2014 by Aroldis Chapman with the Cincinnati Reds. On July 19, Knebel's streak ended at 45 games after failing to record a strikeout in a blown save against the Pittsburgh Pirates.