On mound Monday night, is J.A. Happ's spot in Yankees' postseason rotation in danger?With one rotation slot left, Happ's production hasn't been worthy of the role8/26/2019, 9:00 PMAug 14, 2019; Bronx, NY, USA; New York Yankees starting pitcher J.A. Happ (34) pauses before pitching against the Baltimore Orioles in the first inning at Yankee Stadium. Mandatory Credit: Noah K. Murray-USA TODAY Sports / Noah K. Murray