Why Zack Britton, Adam Ottavino are most important arms in Yankees' bullpenTwo offseason signings are strengths of stacked bullpen3/11/2019, 2:13 PMOct 9, 2018; Bronx, NY, USA; New York Yankees relief pitcher Zach Britton (53) pitches during the fourth inning against the Boston Red Sox in game four of the 2018 ALDS playoff baseball series at Yankee Stadium. Mandatory Credit: Brad Penner-USA TODAY Sports / Brad Penner